MAP Electrical Systems

1998 Chevrolet Pickup C1500
Uniform Inspection and Communication Standards ELECTRICAL SYSTEMS
Uniform Inspection and Communication Standards
ELECTRICAL SYSTEMS
OVERVIEW
The Motorist Assurance Program is the consumer outreach effort of the Automotive Maintenance and Repair
Association, Inc. (AMRA). Participation in the Motorist Assurance Program is drawn from retailers, suppliers,
independent repair facilities, vehicle manufacturers and industry associations.
Our organization's mission is to strengthen the relationship between the consumer and the auto repair industry.
We produce materials that give motorists the information and encouragement to take greater responsibility for
their vehicles through proper, manufacturer-recommended, maintenance. We encourage participating service
and repair shops (including franchisees and dealers) to adopt (1) a Pledge of Assurance to their Customers and
(2) the Motorist Assurance Program Standards of Service. All participating service providers have agreed to
subscribe to this Pledge and to adhere to the promulgated Standards of Service demonstrating to their customers
that they are serious about customer satisfaction.
These Standards of Service require that an inspection of the vehicle's (problem) system be made and the results
communicated to the customer according to industry standards. Given that the industry did not have such
standards, the Motorist Assurance Program successfully promulgated industry inspection communication
standards in 1994-95 for the following systems: Exhaust, Brakes, ABS, Steering and Suspension, Engine
Maintenance and Performance, HVAC, Electrical Systems, and Drive Train and Transmissions. Further,
revisions to all of these inspection communication standards are continually re-published. Participating shops
utilize these Uniform Inspection & Communication Standards as part of the inspection process and for
communicating their findings to their customers.
The Motorist Assurance Program continues to work cooperatively and proactively with government agencies
and consumer groups toward solutions that both benefit the customer and are mutually acceptable to both
regulators and industry. We maintain the belief that industry must retain control over how we conduct our
business, and we must be viewed as part of the solution and not part of the problem. Meetings with state and
other government officials (and their representatives), concerned with auto repair and/or consumer protection,
are conducted. Feedback from these sessions is brought back to the association, and the program adjusted as
needed.
To assure auto repair customers recourse if they were not satisfied with a repair transaction, the Motorist
Assurance Program offers mediation and arbitration through the Better Business Bureau and other non-profit
organizations. MAP conducted pilot programs in twelve states before announcing the program nationally in
October 1998. During the pilots, participating repair shops demonstrated their adherence to the Pledge and
Standards and agreed to follow the UICS in communicating the results of their inspection to their customers.
To put some "teeth" in the program, an accreditation requirement for shops was initiated. The requirements are
stringent, and a self-policing method has been incorporated which includes the "mystery shopping" of outlets.
We welcome you to join us as we continue our outreach with your support, both the automotive repair industry
and your customers will reap the benefits. Please visit MAP at our Internet site www.motorist.org or contact us
at:
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Tuesday, November 08, 2005 3:12:16
3:12:10 PM Page 1 © 2004 Mitchell Repair Information Company, LLC.
7101 Wisconsin Avenue
Bethesda, MD 20814
Phone (301) 634-4955 - Fax (202) 318-0378
January 2002
Map@motorist.org
OVERVIEW OF SERVICE REQUIREMENTS AND SUGGESTIONS

It is MAP policy that all exhaust, brake, steering, suspension, wheel alignment, drive-line, engine performance
and maintenance, and heating, ventilation and air conditioning, and electrical services be offered and performed
under the standards and procedures specified in these sections.
Before any service is performed on a vehicle, an inspection of the appropriate system must be performed. The
results of this inspection must be explained to the customer and documented on an inspection form. The
condition of the vehicle and its components will indicate what services/part replacements may be "Required" or
"Suggested". In addition, suggestions may be made to satisfy the requests expressed by the customer.
When a component is suggested or required to be repaired or replaced, the decision to repair or replace must be
made in the customer's best interest, and at his or her choice given the options available.
This section lists the various parts and conditions that indicate a required or suggested service or part
replacement. Although this list is extensive, it is not fully inclusive. In addition to this list, a technician may
make a suggestion. However, any suggestions must be based on substantial and informed experience, or the
vehicle manufacturer's recommended service interval and must be documented.
Some conditions indicate that service or part replacement is required because the part in question is no longer
providing the function for which it is intended, does not meet a vehicle manufacturer's design specification or is
missing.
Example: An exhaust pipe has corroded severely and has a hole in it through which exhaust gases are leaking.
Replacement of the exhaust pipe in this case is required due to functional failure.
Example: A brake rotor has been worn to the point where it measures less than the vehicle manufacturer's
discard specifications. Replacement of the rotor is required because it does not meet design specifications.
Some conditions indicate that a service or part replacement is suggested because the part is close to the end of
its useful life or addresses a customer's need, convenience or request. If a customer's vehicle has one of these
conditions, the procedure may be only to suggest service.
Example: An exhaust pipe is rusted, corroded or weak, but no leaks are present. In this case, the exhaust pipe
has not failed. However, there is evidence that the pipe may need replacement in the near future. Replacement
of the pipe may be suggested for the customer's convenience in avoiding a future problem.
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Tuesday, November 08, 2005 3:12:10 PM Page 2 © 2004 Mitchell Repair Information Company, LLC.
Example: The customer desires improved ride and/or handling, but the vehicle's shocks or struts have not failed.
In this case, replacement may be suggested to satisfy the customer's wishes. In this case, replacement of the
shocks or struts may not be sold as a requirement.
A customer, of course, has the choice of whether or not a shop will service his or her vehicle. He or she may
decide not to follow some of your suggestions. When a repair is required , a MAP shop must refuse partial
service on that system if, in the judgment of the service provider, proceeding with the work could create or
continue an unsafe condition. When a procedure states that required or suggested repair or replacement is
recommended, the customer must be informed of the generally acceptable repair/replacement options whether
or not performed by the shop.
When presenting suggested repairs to the customer, you must present the facts, allowing the customer to draw
their own conclusions and make an informed decision about how to proceed.
The following reasons may be used for required and suggested services. These codes are shown in the "Code"
column of the MAP Uniform Inspection & Communications Standards that follow:
Reasons to Require Repair or Replacement
A - Part no longer performs intended purpose

B - Part does not meet a design specification (regardless of performance)
C - Part is missing
NOTE: When a repair is required , the shop must refuse partial service to the system in
question, if the repair creates or continues an unsafe condition.
Reasons to Suggest Repair or Replacement
1 - Part is close to the end of its useful life (just above discard specifications, or weak; failure likely to
occur soon, etc.)
2 - To address a customer need, convenience, or request (to stiffen ride, enhance performance, eliminate
noise, etc.)
3 - To comply with maintenance recommended by the vehicle's Original Equipment Manufacturer (OEM)
4 - Technician's recommendation based on substantial and informed experience
NOTE: Suggested services are always optional. When presenting suggested repairs to
the customer, you must present the facts, allowing the customer to draw their
own conclusions and make an informed decision about how to proceed.
SERVICE PROCEDURES REQUIRED AND SUGGESTED FOR PROPER

VEHICLE OPERATION
NOTE: When working on electrical systems, if a potentially hazardous condition is

observed, require repair or replacement of affected components prior to
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performing further work.
ACTUATOR MOTORS (SOLENOIDS) (ELECTRIC)

Actuator Motors (Solenoids) (Electric)
Condition Code Procedure
Attaching hardware broken A Require repair or replacement of
hardware.
Attaching hardware missing C Require replacement of hardware.
Attaching hardware not functioning A Require repair or replacement of
hardware.
Connector broken A Require repair or replacement.
Connector (Weatherpack type) leaking A Require repair or replacement.
Connector melted A Require repair or replacement. See note
below.
NOTE: Determine cause and correct prior to repair or replacement of part.
Connector missing C Require replacement.
Inoperative A Require replacement. See note below.
NOTE: Inoperative includes intermittent operation or out of OEM specification.
Linkage bent, affecting performance A Require repair or replacement of linkage.
Linkage bent, not affecting performance 2 Suggest repair or replacement of linkage.
Linkage binding, affecting performance A Require repair or replacement of linkage.
Linkage binding, not affecting 1 Suggest repair or replacement of linkage.
performance
Linkage broken A Require repair or replacement of linkage.
Linkage loose, affecting performance A Require repair or replacement of linkage.
Linkage loose, not affecting 1 Suggest repair or replacement of linkage.
performance
Linkage missing C Require replacement.
Linkage noisy 2 Suggest repair or replacement.
Missing C Require replacement.
Terminal broken A Require repair or replacement.
Terminal burned, affecting performance A Require repair or replacement. See note
below.
Terminal burned, not affecting 1 Suggest repair or replacement. See note
performance below.
Terminal corroded, affecting A Require repair or replacement.
performance
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Terminal corroded, not affecting 1 Suggest repair or replacement.

performance
Terminal loose, affecting performance B Require repair or replacement.
Terminal loose, not affecting 1 Suggest repair or replacement.
performance
Noisy 2 Suggest repair or replacement.
Out of adjustment B Require repair or replacement.
ACTUATOR MOTORS (VACUUM)

Actuator Motors (Vacuum)
hardware.
hardware.
below.
Leaking (vacuum) A Require repair or replacement.
Linkage bent, affecting performance A Require repair or replacement of linkage.
Linkage bent, not affecting 2 Suggest repair or replacement of linkage.
performance
Linkage binding, affecting performance A Require repair or replacement of linkage.
Linkage binding, not affecting 1 Suggest repair or replacement of linkage.
performance
Linkage broken A Require repair or replacement of linkage.
Linkage loose, affecting performance A Require repair or replacement of linkage.
Linkage loose, not affecting 1 Suggest repair or replacement of linkage.
performance
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Out of adjustment A Require repair or replacement.
AIR BAGS
For all air bag components and conditions, refer to vehicle manufacturer's specifications for diagnosis and parts
replacement.
ALTERNATORS AND GENERATORS
NOTE: If components have been added that increase vehicle electrical load
requirement (for example, sound systems, air conditioning, alarm systems,
etc.), charging system output must meet the increased demand.
Alternators and Generators

Alternator output meets OEM specification 2 Suggest upgrade of alternator or
but is insufficient for add-on electrical load removal of excess electrical load.
Alternator's rated output is below OEM B Require replacement.
specification
hardware.
Attaching hardware non-functioning A Require repair or replacement of
hardware.
Connector melted A Require repair or replacement. See
note below.
Diode inoperative A Require repair or replacement. See
note below.
Housing broken, affecting performance A Require repair or replacement.
Housing broken, not affecting performance No service suggested or required.
Housing cracked, affecting performance A Require repair or replacement.
Housing cracked, not affecting performance 1 Suggest repair or replacement.
Inoperative A Require repair or replacement. See
note below.
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Pulley incorrect B Require replacement.
Terminal burned, affecting performance A Require repair or replacement. See
note below.
Terminal burned, not affecting performance 2 Suggest repair or replacement.
Terminal corroded, affecting performance A Require repair or replacement.
Terminal corroded, not affecting performance 2 Suggest repair or replacement.
Terminal loose, not affecting performance 1 Suggest repair or replacement.
Terminal resistance (voltage drop) out of A Require repair or replacement.
specification
Threads damaged A Require repair or replacement.
Threads stripped (threads missing) A Require replacement.
Voltage drop out of specification A Require repair or replacement.
AMPLIFIERS
See Receivers, Amplifiers, Equalizers, and Sub-Woofer Volume Controls.
ANTENNAS
Antennas
hardware.
hardware.
Broken A Require replacement.
Bent 2 Suggest repair or replacement.
Binding 2 Suggest repair or replacement.
below.
NOTE: Inoperative includes intermittent operation or out of specification.
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Insulation damaged, conductors exposed A Require repair or replacement.

Insulation damaged, conductors not 1 Suggest replacement.
exposed
Motor runs continuously A Require or replacement.
Power antenna noisy 2 Suggest repair or replacement.
Sticking 2 Suggest repair or replacement.
below.
Terminal burned, not affecting 2 Suggest repair or replacement.
performance
performance
performance
performance
BATTERIES
Proper operation of any electrical system or component can be affected by battery condition. The battery(ies)
must meet or exceed minimum specification for vehicle as equipped and test to that specific battery's CCA.
Definition of Terms
Battery Performance Testing - Testing that determines whether or not a battery meets both vehicle OEM and
battery manufacturer's specifications.
Cold Cranking Amp (CCA) Rating - The number of amperes a new, fully charged battery at 0°F (-17.8°C) can
deliver for 30 seconds and maintain at least a voltage of 1.2 volts per cell (7.2 volts for a 12-volt battery).
Cranking Amps (CA) - The number of amperes a new, fully charged battery, typically at 32°F (0° C) can
deliver for 30 seconds and maintain at least a voltage of 1.2 volts per cell (7.2 volts for a 12-volt battery).
OEM Cranking Amps - The minimum CCA required by the original vehicle manufacturer for a specific vehicle.
Batteries
Battery frozen Further inspection required. See note
below.
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NOTE: Do not attempt to charge a frozen battery. Allow battery to warm thoroughly and
then performance-test. If battery fails performance test, require replacement.
Case leaking A Require replacement.
Casing swollen A Further inspection required. See note
below.
NOTE: No service suggested or required unless the battery fails performance test, in
which case, require replacement.
Circuit open internally A Require replacement.
Electrolyte contamination A Further inspection required. See note
below.
Electrolyte discoloration A Further inspection required. See note
below.
Fails to accept and hold charge A Require replacement. See note below.
NOTE: This phrase refers to a battery that fails to either accept and/or retain a charge
using appropriate times listed in the Battery Charging Guide of the BCI Service Manual,
battery charger operating manual, or battery manufacturer's specifications.
Fluid level low B Further inspection required. See note
below.
NOTE: Determine cause of low fluid level. Refill to proper level(s) with water (distilled
water preferred). Recharge battery and performance-test.
If battery does not meet specifications, require replacement.
If battery is sealed type (non-removable filler caps), require replacement.
Out of performance specification for B Require replacement. See note below.
battery
NOTE: The battery may meet vehicle's OEM specifications for that vehicle but test
below the minimum specifications defined by the battery manufacturer.
Out of specification for application B Require replacement.
NOTE: The battery may meet battery manufacturer's specifications but test below the
minimum specification defined by the vehicle's OEM for that vehicle.
Post (top or side) burned, affecting A Require repair or replacement. See note
performance below.
Post (top or side) burned, not 2 Suggest repair or replacement. See note
affecting performance below.
Post (top or side) corroded, affecting A Require repair.
performance
Post (top or side) corroded, not 2 Suggest repair.
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affecting performance
Post (top or side) loose A Require replacement.
Post (top or side) melted, affecting A Require repair or replacement. See note
performance below.
Post (top or side) melted, not 2 Suggest repair or replacement. See note
affecting performance below.
Specific gravity low B Further inspection required. See note
below.
NOTE: Recharge and test to manufacturer's specifications. If battery fails performance
test, require replacement.
State of charge low A Further inspection required. See note
below.
NOTE: Recharge and test to manufacturer's specifications. If battery fails performance
test, require replacement.
Top dirty 2 Suggest cleaning battery.
Top wet A Require cleaning battery. Further inspection
required. See note below.
NOTE: Check fluid level and adjust to manufacturer's specification. Suggest checking
charging system for proper operation.
Vent cap loose A Require repair or replacement of vent cap.
Vent cap missing C Require replacement of vent cap.
BATTERY CABLES
See Battery Cables, Wires, and Connectors.
BATTERY CABLES, WIRES, AND CONNECTORS

Battery Cables, Wires, and Connectors
Application incorrect B Require repair or replacement.
hardware.
hardware.
below.
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Insulation damaged, conductors A Require repair or replacement. See note
exposed below.
NOTE: Exposed conductor at replacement (aftermarket) terminal end does not require
repair or replacement.
exposed
Open A Require repair or replacement.
Protective shield (conduit) melted 2 Suggest repair or replacement. See note
below.
Protective shield (conduit) missing 2 Suggest repair or replacement.
Resistance (voltage drop) out of A Require repair or replacement.
specification
Routed incorrectly B Require repair.
Secured incorrectly B Require repair.
Shorted A Require repair or replacement.
below.
performance
performance
performance
performance
BATTERY HOLD DOWN HARDWARE

See Battery Trays and Hold Down Hardware.
BATTERY TRAYS AND HOLD DOWN HARDWARE

Battery Trays and Hold Down Hardware
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Battery improperly secured 2 Suggest repair.

Bent, affecting performance A Require repair or replacement.
Bent, not affecting performance No service suggested or required.
Broken, affecting performance A Require repair or replacement.
Broken, not affecting performance No service suggested or required.
Corroded, affecting performance A Require repair or replacement.
Corroded, not affecting performance 2 Suggest repair or replacement.
Cracked, affecting performance A Require repair or replacement.
Cracked, not affecting performance 1 Suggest repair or replacement.
Water drain clogged A Require repair.
BATTERY WIRES
See Battery Cables, Wires, and Connectors.
BELTS
Belts
Alignment incorrect B Further inspection required. See note below.
NOTE: Determine cause of incorrect alignment and require repair.
Cracked 1 Suggest replacement.
Frayed 1 Suggest replacement.
Noisy 2 Further inspection required. See note below.
NOTE: Determine cause of noise and suggest repair.
Plies separated A Require replacement.
Tension out of specification B Require adjustment or replacement.
Worn beyond adjustment range B Require replacement.
Worn so it contacts bottom of pulley A Require replacement.
BULB SOCKETS
Bulb Sockets
hardware.
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hardware.
Bulb seized in socket A Require repair or replacement.
Burned, affecting performance A Require repair or replacement. See note
below.
NOTE: Determine cause and correct prior to repair or replacement of socket.
Burned, not affecting performance 2 Suggest repair or replacement. See note
below.
NOTE: Determine cause and correct prior to repair or replacement of socket.
Broken A Require repair or replacement.
below.
Leaking A Require repair or replacement.
Melted A Require replacement. See note below.
NOTE: Determine cause and correct prior to replacement of part.
below.
performance
performance
performance
performance
BULBS, SEALED BEAMS, AND LEDS
NOTE: Does not include soldered-in components.
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Bulbs, Sealed Beams, and LEDs

Adjustment out of specification B Require repair or replacement.
Application incorrect B Require replacement. See note below.
NOTE: Application incorrect includes wrong bulb coating or color.
hardware.
hardware.
Base burned, affecting performance A Require repair or replacement. See note
below.
Base burned, not affecting performance 2 Suggest repair or replacement. See note
below.
Base corroded, affecting performance A Require repair or replacement.
Base corroded, not affecting 2 Suggest repair or replacement.
performance
Base leaking A Require repair or replacement.
Base loose, affecting performance B Require repair or replacement.
Base loose, not affecting performance 1 Suggest repair or replacement.
Base melted A Require replacement. See note below.
Bracket bent, affecting performance A Require repair or replacement.
Bracket bent, not affecting performance No service suggested or required.
Bracket broken, affecting performance A Require replacement.
Bracket broken, not affecting No service suggested or required.
performance
Bracket corroded, affecting performance A Require repair or replacement.
Bracket corroded, not affecting 2 Suggest repair or replacement.
performance
Bracket cracked, affecting performance A Require repair or replacement.
Bracket cracked, not affecting 1 Suggest repair or replacement.
performance
Bracket loose, affecting performance A Require repair or replacement.
Bracket loose, not affecting performance 1 Suggest repair or replacement.
Bracket missing C Require replacement.
Burned out A Require replacement.
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below.
Cracked A Require replacement.
Intermittent A Require replacement.
Lamp base melted A Require replacement. See note below.
Seized in socket A Require repair or replacement.
below.
Terminal burned, not affecting 2 Suggest repair or replacement. See note
performance below.
performance
performance
performance
CD PLAYERS
See Tape Players and CD Players.
CIGARETTE LIGHTER ASSEMBLIES

Cigarette Lighter Assemblies
hardware.
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hardware.
Inoperative A Require repair or replacement. See note
below.
Loose A Require repair or replacement.
Missing 2 Suggest replacement.
Sticking A Require repair or replacement.
below.
performance
performance
performance
performance
CIRCUIT BREAKERS
See Fuses, Fusible Links, and Circuit Breakers.
CLUTCH SWITCHES
See Switches.
CONNECTORS
See Wiring Harnesses and Connectors.
CONTROL MODULES
Control Modules
Application incorrect B Require replacement.
Attaching hardware threads A Require repair or replacement of hardware.
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damaged
stripped (threads missing)
Code set (if applicable) A Further inspection required. See note below.
NOTE: Refer to manufacturer's diagnostic trouble code procedure and require repair or
replacement of affected component(s).
below.
Connector missing A Require repair.
Contaminated A Require repair or replacement. See note
below.
NOTE: Determine source of contamination, such as engine coolant, fuel, metal particles,
or water. Require repair or replacement.
Inoperative B Require repair or replacement. Further
inspection required. See note below.
NOTE: Inoperative includes intermittent operation or out of OEM specification. Some
components may be serviceable; check for accepted cleaning procedure.
Terminal burned, affecting A Require repair or replacement. See note
performance below.
performance
performance
performance
Terminal loose, affecting B Require repair or replacement.
performance
performance
Wire lead conductors exposed B Require repair or replacement.
Wire lead corroded A Require repair or replacement.
Wire lead open A Require repair or replacement.
Wire lead shorted A Require repair or replacement.
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CRUISE CONTROL BRAKE SWITCHES

See Switches.
CRUISE CONTROL CABLES

See Cruise Control Linkages and Cables.
CRUISE CONTROL CLUTCH SWITCHES

See Switches.
CRUISE CONTROL LINKAGES AND CABLES

Cruise Control Linkages and Cables
hardware.
hardware.
Bent A Require repair or replacement.
Binding A Require repair or replacement.
performance
Bracket corroded, affecting A Require repair or replacement.
performance
performance
performance
Bracket loose, not affecting 1 Suggest repair or replacement.
performance
Cracked A Require repair or replacement.
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Disconnected A Require repair or replacement.

Kinked A Require repair or replacement.
Melted A Require repair or replacement. See note
below.
Out of adjustment B Require repair or replacement. See note
below.
NOTE: Follow OEM recommended adjustment procedures. Require repair or
replacement if out of specification.
Routed incorrectly 2 Suggest repair.
Seized A Require repair or replacement.
CRUISE CONTROL RESERVOIRS

See Cruise Control Vacuum Hoses, Tubes, and Reservoirs.
CRUISE CONTROL TUBES

See Cruise Control Vacuum Hoses, Tubes, and Reservoirs.
CRUISE CONTROL VACUUM DUMP RELEASE VALVES

Cruise Control Vacuum Dump Release Valves
Attaching hardware broken A Require repair or replacement of hardware.
Attaching hardware not functioning A Require repair or replacement of hardware.
Leaking 2 Suggest replacement.
Out of adjustment B Further inspection required. See note below.
NOTE: Follow OEM recommended adjustment procedures. Require repair or
replacement if out of specification.
CRUISE CONTROL VACUUM HOSES, TUBES, AND RESERVOIRS

Cruise Control Vacuum Hoses, Tubes, and Reservoirs
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Melted A Require replacement.

Oil-soaked (spongy) 1 Suggest replacement.
Restricted A Require repair or replacement.
Surface cracks (dry-rotted) 1 Suggest replacement.
CRUISE CONTROL VEHICLE SPEED SENSORS

Cruise Control Vehicle Speed Sensors
Air gap incorrect B Require adjustment to vehicle manufacturer's
specifications. See note below.
NOTE: If a sensor is not adjustable, further inspection is required to identify and correct
cause.
Attaching hardware not A Require repair or replacement of hardware.
functioning
Housing cracked A Require replacement.
Internal resistance does not meet B Require replacement. See note below.
specifications
NOTE: Component failure may be caused by water intrusion into the wiring harness.
Always check insulation for damage and wiring for excessive resistance.
Lead routing incorrect B Require rerouting according to vehicle
manufacturer's specifications.
Loose B Require adjustment to vehicle manufacturer's
specifications. See note below.
NOTE: Some integral bearing assemblies with sensors may require replacement.
Output signal incorrect B Require repair or replacement. See note below.
NOTE: Component failure may be caused by water intrusion into the wiring harness.
Always check insulation for damage and wiring for excessive resistance.
Surface contaminated 2 Suggest cleaning; identify and correct source.
Tip bent B Require replacement.
Tip broken B Require replacement.
Tip missing B Require replacement.
Wire lead burned A Require replacement.
Wire lead conductors exposed B Require replacement.
Wire lead corroded A Require replacement.
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Wire lead open A Require replacement.

Wire lead shorted A Require replacement.
DEFOGGERS
See Heating Elements (Defrosters, Defoggers, Electric Heaters, and Seats).
DEFROSTERS
DELAYS
Delays
hardware.
hardware.
Binding, affecting performance A Require repair or replacement.
Binding, not affecting performance 2 Suggest repair or replacement.
below.
below.
below.
Melted, affecting performance A Require repair or replacement. See note
below.
Melted, not affecting performance 2 Suggest repair or replacement. See note
below.
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below.
performance
performance
performance
performance
DIMMERS
Dimmers
hardware.
hardware.
below.
below.
below.
below.
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below.
below.
performance
performance
performance
performance
ELECTRIC HEATERS
EQUALIZERS
FUSE BLOCKS
See Fuse Boxes and Blocks.
FUSE BOXES AND BLOCKS

Fuse Boxes and Blocks
hardware.
hardware.
Broken, affecting performance A Require replacement.
below.
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NOTE: Determine cause and correct prior to repair or replacement of fuse box.
below.
NOTE: Determine cause and correct prior to repair or replacement of fuse box.
below.
Cover missing C Require replacement of cover.
Melted, affecting performance A Require replacement. See note below.
Melted, not affecting performance 2 Suggest replacement. See note below.
below.
performance
performance
performance
performance
FUSES, FUSIBLE LINKS, AND CIRCUIT BREAKERS

Fuses, Fusible Links, and Circuit Breakers
Blown A Require replacement.
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NOTE: Inoperative includes intermittent operation.
exposed
below.
performance
performance
performance
performance
FUSIBLE LINKS
See Fuses, Fusible Links, and Circuit Breakers.
GAUGES
NOTE: Includes odometers, speedometers, and tachometers (except cable-driven).
Gauges
hardware.
hardware.
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below.
Leaking A Require replacement.
Lens broken A Require repair or replacement. See note
below.
NOTE: If lens is available as a separate part, require replacement of lens only.
Lens cloudy 2 Suggest repair or replacement. See note
below.
NOTE: If lens is available as a separate part, suggest replacement of lens only.
Lens missing C Require repair or replacement. See note
below.
Malfunctioning A Require repair or replacement. See note
below.
NOTE: Includes inoperative, intermittent operation, failure to perform all functions, out
of OEM specification, or out of range.
Mechanical head noisy 2 Suggest repair or replacement.
below.
performance
performance
performance
performance
GENERATORS
See Alternators and Generators.
GROUND CABLES AND STRAPS

Ground Cables and Straps
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hardware.
hardware.
Insulation damaged, exposing conductors 2 Suggest replacement.
Loose A Require repair.
Resistance high A Require repair or replacement.
Terminal resistance (voltage drop) is out of B Require repair or replacement.
specification
Voltage drop out of specification B Require repair or replacement.
GROUND STRAPS
See Ground Cables and Straps.
HEADLIGHT ADJUSTERS
Headlight Adjusters
Bent, preventing adjustment A Require repair or replacement.
Indicator broken A Require replacement.
Indicator missing C Require replacement.
Missing C Require replacement of adjusters.
HEATING ELEMENTS (DEFROSTERS, DEFOGGERS, ELECTRIC HEATERS,

AND SEATS)
Heating Elements (Defrosters, Defoggers, Electric Heaters, and Seats)
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hardware.
hardware.
below.
below.
below.
performance
performance
performance
performance
Wire lead burned A Require repair or replacement.
HORNS AND SIRENS

Horns and Sirens
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below.
below.
Out of adjustment B Require adjustment.
Sound quality poor A Require repair or replacement. Further
inspection required.
performance below.
performance
performance
performance
performance
performance
IGNITION SWITCHES
See Switches.
INDICATOR LIGHTS
Indicator Lights
Does not come on during bulb check Further inspection required. See note
below.
NOTE: See service manual for further information.
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Fails to function properly during test Further inspection required. See note
mode below.
On constantly Further inspection required. See note
below.
On intermittently Further inspection required. See note
below.
KEYLESS ENTRY KEYPADS AND TRANSMITTERS

Keyless Entry Keypads and Transmitters
hardware.
hardware.
below.
below.
NOTE: Malfunctioning includes inoperative, intermittent operation, or failure to perform
all functions.
below.
performance
performance
performance
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performance
KEYLESS ENTRY TRANSMITTERS

See Keyless Entry Keypads and Transmitters.
LEDS
See Bulbs, Sealed Beams, and LEDs.
LENSES
Lenses
Adjustment out of specification B Require repair.
Application incorrect A Require replacement.
Discolored A Require replacement.
Melted, affecting performance A Require replacement.
Melted, not affecting performance 2 Suggest replacement.
MICROPHONES
See Speakers and Microphones.
MIRRORS (ELECTROCHROMATIC AND HEATED)

Mirrors (Electrochromatic and Heated)
Home
hardware.
hardware.
below.
below.
performance
performance
performance
performance
MOTORS
Motors
Amperage draw out of specification A Require repair or replacement.
hardware.
Home

hardware.
Bracket bent A Require repair or replacement.
Bracket broken A Require repair or replacement.
Bracket cracked A Require repair or replacement.
Bracket holes elongated, affecting A Require repair or replacement.
performance
Bracket holes elongated, not affecting No service suggested or required.
performance
note below.
Drive mechanism damaged, affecting A Require repair or replacement. See
performance note below.
NOTE: Further inspection required to determine cause.
Drive mechanism damaged, not affecting 2 Suggest repair or replacement. See
Fails to disengage A Require repair or replacement.
Housing broken, affecting performance 2 Suggest repair or replacement.
Housing broken, not affecting performance No service suggested or required.
Housing cracked, affecting performance A Require repair or replacement.
Housing cracked, not affecting performance 1 Suggest repair or replacement.
note below.
Linkage bent, affecting performance A Require repair or replacement of
linkage.
Linkage bent, not affecting performance No service suggested or required.
Linkage binding, affecting performance A Require repair or replacement of
linkage.
Linkage binding, not affecting performance 2 Suggest repair or replacement of
linkage.
Linkage broken A Require repair or replacement of
linkage.
Linkage loose, affecting performance A Require repair or replacement of
linkage.
Home
Linkage loose, not affecting performance 1 Suggest repair or replacement of

linkage.
Out of adjustment B Further inspection required. See note
below.
NOTE: Follow OEM recommended adjustment procedures. Repair or replace if out of
specification.
Resistance out of specification A Require repair or replacement.
note below.
performance
NEUTRAL SAFETY SWITCHES

See Switches.
ODOMETERS
See Gauges.
ODOMETERS, SPEEDOMETERS, AND TACHOMETERS (CABLE-DRIVEN)

Odometers, Speedometers, and Tachometers (Cable-driven)
hardware.
Home

hardware.
below.
Drive cable broken A Require replacement.
Drive cable noisy 2 Suggest repair or replacement.
Inoperative A Further inspection required. See note
below.
NOTE: Inoperative includes intermittent operation, out of OEM specification, or out of
range.
Leaking A Require replacement.
Lens broken A Require repair or replacement. See note
below.
Lens cloudy 2 Suggest repair or replacement. See note
below.
NOTE: If lens is available as a separate part, suggest replacement of lens only.
Lens missing C Require repair or replacement. See note
below.
below.
performance
performance
performance
performance
PULLEYS
Home
Pulleys
Alignment incorrect B Require repair or replacement.
Bent A Require replacement.
Pulley damaged, affecting belt life A Require replacement.
RECEIVERS, AMPLIFIERS, EQUALIZERS, AND SUB-WOOFER VOLUME

CONTROLS
Receivers, Amplifiers, Equalizers, and Sub-Woofer Volume Controls
hardware.
hardware.
below.
below.
all functions.
Sound quality poor A Require repair or replacement. See note
below.
NOTE: Make sure poor sound quality is not caused by ignition/charging system or other
forms of electrical interference.
below.
Home

performance
performance
performance
performance
RELAY BOXES
Relay Boxes
hardware.
hardware.
below.
NOTE: Determine cause and correct prior to repair or replacement of relay box.
below.
NOTE: Determine cause and correct prior to repair or replacement of relay box.
below.
Cover missing C Require replacement of cover.
Melted, affecting performance A Require replacement. See note below.
Home

Melted, not affecting performance 2 Suggest replacement. See note below.
below.
performance
performance
performance
performance
RELAYS
Relays
hardware.
hardware.
Housing broken A Require replacement.
Housing cracked 2 Suggest replacement.
below.
performance
performance
performance
Home

performance
SEALED BEAMS
See Bulbs, Sealed Beams, and LEDs.
SEAT HEATERS
SECURITY ALARM SENSORS

Security Alarm Sensors
damaged
stripped (threads missing)
Connector melted A Require repair or replacement. See note below.
Inoperative B Require repair or replacement. Further
inspection required. See note below.
Resistance out of specification B Require repair or replacement.
Terminal burned, affecting A Require repair or replacement. See note below.
performance
performance
performance
performance
Home
performance
performance
SIRENS
See Horns and Sirens.
SOLENOIDS
See Actuator Motors (Solenoids) (Electric).
NOTE: For starter solenoids that are integral to the starter assembly, see Starters.
NOTE: For starter relays, see Relays.
SPEAKERS AND MICROPHONES

Speakers and Microphones
Application incorrect A Require replacement.
functioning
Connector (Weatherpack type) A Require repair or replacement.
leaking
Connector melted A Require repair or replacement. See note below.
Inoperative
Membrane torn A Require replacement.
Home

Polarity reversed A Require repair.
Sound quality poor A Require repair or replacement. Further inspection
required. See note below.
Terminal burned, affecting A Require repair or replacement. See note below.
performance
performance
performance
performance
performance
performance
SPEEDOMETER AND TACHOMETER LINKAGES AND CABLES

Speedometer and Tachometer Linkages and Cables
hardware.
hardware.
Binding A Require repair or replacement.
performance
performance
performance
Home

performance
performance
Cracked A Require repair or replacement.
Disconnected A Require repair or replacement.
Kinked A Require repair or replacement.
Melted A Require repair or replacement. See note
below.
Routed incorrectly 2 Suggest repair.
SPEEDOMETER CABLES
See Speedometer and Tachometer Linkages and Cables.
SPEEDOMETERS
See Gauges.
STARTERS
NOTE: To prevent misdiagnosis, care should be taken to eliminate the possibilities of

mechanical problems or high resistance in power and/or ground circuits.
Starters
Amperage draw does not meet OEM B Require repair or replacement.
specifications
hardware.
hardware. See note below.
Home
NOTE: Inspect block or bell housing mounting surface.

Bracket bent, not affecting No service suggested or required.
performance
performance
performance
performance
performance
Bracket holes elongated, affecting A Require repair or replacement.
performance
Bracket holes elongated, not affecting No service suggested or required.
performances)
performance
Drive gear damaged, affecting A Require repair or replacement. See note
performance below.
NOTE: Further inspection required to determine cause. Require inspection of ring gear.
Drive gear damaged, not affecting 2 Suggest repair or replacement. See note
performance below.
NOTE: Further inspection required to determine cause. Require inspection of ring gear
and service as needed.
Fails to disengage A Require repair or replacement.
Housing broken, affecting performance 2 Require repair or replacement.
Housing broken, not affecting No service suggested or required.
performance
Housing cracked, affecting A Require repair or replacement.
performance
Housing cracked, not affecting 2 Suggest repair or replacement.
performance
below.
Home
Shimmed incorrectly B Require repair.

Starter shaft bushing missing C Require replacement. See note below.
NOTE: Bushing may be in bell housing.
Starter shaft bushing worn, affecting A Require replacement.
performance
Starter shaft bushing worn, not 1 Suggest replacement.
affecting performance
performance below.
performance
performance
performance
performance
SUB-WOOFER VOLUME CONTROLS

SWITCHES
Switches
hardware.
hardware.
below.
Home
below.
below.
NOTE: Includes inoperative, intermittent operation, or failure to perform all functions.
below.
below.
Out of adjustment B Require repair or replacement.
below.
performance
performance
performance
performance
Won't return A Require repair or replacement.
Worn 1 Suggest replacement.
TACHOMETER CABLES
See Speedometer and Tachometer Linkages and Cables.
TACHOMETERS
See Gauges.
TAPE PLAYERS AND CD PLAYERS

Home
Tape Players and CD Players

hardware.
hardware.
below.
below.
all functions.
Skips A Require repair or replacement.
below.
Speed incorrect A Require repair or replacement.
below.
performance
performance
performance
performance
Home
TENSIONERS
Tensioners
Alignment incorrect B Require repair or replacement.
Bearings worn 1 Suggest replacement.
Belt tension incorrect B Require adjustment or repair.
Cracked 2 Suggest replacement.
Noisy 2 Suggest replacement.
Pulley damaged, affecting belt life A Require replacement.
TIMERS
Timers
hardware.
hardware.
below.
below.
below.
below.
Home

below.
below.
performance
performance
performance
performance
TIRE PRESSURE SENSORS

Tire Pressure Sensors
functioning
below.
TRANSCEIVERS
Transceivers
hardware.
hardware.
Home

below.
below.
all functions.
below.
below.
performance
performance
performance
performance
TRANSDUCERS
Transducers
hardware.
hardware.
Home

note below.
Drive mechanism damaged, affecting A Require repair or replacement. See
Drive mechanism damaged, not affecting 2 Suggest repair or replacement. See
note below.
NOTE: Inoperative includes intermittent operation or out of specification.
Leaking (vacuum/fluid/air) A Require replacement.
Linkage bent, affecting performance A Require repair or replacement of
linkage.
Linkage bent, not affecting performance No service suggested or required.
Linkage binding, affecting performance A Require repair or replacement of
linkage.
Linkage binding, not affecting performance 2 Suggest repair or replacement of
linkage.
Linkage broken A Require repair or replacement of
linkage.
Linkage loose, affecting performance A Require repair or replacement of
linkage.
Linkage loose, not affecting performance 1 Suggest repair or replacement of
linkage.
Out of adjustment B Further inspection required. See note
below.
NOTE: Follow OEM recommended adjustment procedures. Repair or replace if out of
specification.
note below.
Home

performance
VACUUM ACCUMULATORS (RESERVOIRS)

Vacuum Accumulators (Reservoirs)
VACUUM RESERVOIRS
See Vacuum Accumulators (Reservoirs).
VOLTAGE REGULATORS
Voltage Regulators
hardware.
hardware.
below.
below.
performance
Home

performance
performance
performance
WASHER FLUID LEVEL SENDERS

Washer Fluid Level Senders
hardware.
hardware.
below.
below.
performance
performance
performance
performance
WASHER PUMPS
Home
Washer Pumps
hardware.
hardware.
below.
below.
Leaking externally A Require repair or replacement.
Leaking internally A Require repair or replacement.
Resistance out of specification B Require repair or replacement.
below.
performance
performance
performance
performance
WIPER ARMS AND BLADES
Home
NOTE: Windshield coatings or waxes can cause blades to not function as intended.
Clean surface before making final judgment about blade replacement.
Wiper Arms and Blades

Attaching socket stripped A Require replacement.
Loose 2 Suggest repair or replacement.
Size incorrect 2 Suggest replacement.
Tension insufficient B Require repair or replacement.
Torn A Require replacement.
Worn, affecting performance A Require replacement.
Worn, not affecting performance 1 Suggest replacement.
WIPER BLADES
See Wiper Arms and Blades.
WIPER HOSES AND NOZZLES

Wiper Hoses and Nozzles
Blocked A Require repair or replacement.
Oil-soaked (spongy) 1 Suggest replacement.
Spray pattern incorrect 2 Suggest repair or replacement.
Surface cracks (dry-rotted) 1 Suggest replacement.
WIPER LINKAGES
Wiper Linkages
Home

Attaching stud stripped A Require replacement.
Loose 2 Suggest repair or replacement.
Tension insufficient B Require repair or replacement.
Worn, affecting performance A Require replacement.
Worn, not affecting performance 1 Suggest replacement.
WIPER NOZZLES
See Wiper Hoses and Nozzles.
WIPER PUMP RESERVOIRS

Wiper Pump Reservoirs
Cap missing C Require replacement.
WIRING HARNESSES AND CONNECTORS

Wiring Harnesses and Connectors
Application incorrect B Require repair or replacement.
hardware.
hardware.
Home

below.
Insulation damaged, conductors not 1 Suggest repair or replacement.
exposed
Protective shield (conduit) melted 2 Suggest repair or replacement. See note
below.
Protective shield (conduit) missing C Require repair or replacement.
Resistance (voltage drop) out of A Require repair or replacement.
specification
below.
performance
performance
performance
performance
Home

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1998 Chevrolet Pickup C1500

Uniform Inspection and Communication Standards ELECTRICAL SYSTEMS

Uniform Inspection and Communication Standards

7101 Wisconsin Avenue

Phone (301) 634-4955 - Fax (202) 318-0378

OVERVIEW OF SERVICE REQUIREMENTS AND SUGGESTIONS

Reasons to Require Repair or Replacement

A - Part no longer performs intended purpose

Reasons to Suggest Repair or Replacement

SERVICE PROCEDURES REQUIRED AND SUGGESTED FOR PROPER

NOTE: When working on electrical systems, if a potentially hazardous condition is

performing further work.

ACTUATOR MOTORS (SOLENOIDS) (ELECTRIC)

Terminal corroded, not affecting 1 Suggest repair or replacement.

ACTUATOR MOTORS (VACUUM)

Noisy 2 Suggest repair or replacement.

ALTERNATORS AND GENERATORS

Alternators and Generators

Noisy 2 Suggest repair or replacement.

Insulation damaged, conductors exposed A Require repair or replacement.

BATTERY CABLES, WIRES, AND CONNECTORS

NOTE: Determine cause and correct prior to repair or replacement of part.

BATTERY HOLD DOWN HARDWARE

BATTERY TRAYS AND HOLD DOWN HARDWARE

Battery improperly secured 2 Suggest repair.

Attaching hardware missing C Require replacement of hardware.

BULBS, SEALED BEAMS, AND LEDS

NOTE: Does not include soldered-in components.

Bulbs, Sealed Beams, and LEDs

Connector (Weatherpack type) leaking A Require repair or replacement.

CIGARETTE LIGHTER ASSEMBLIES

Attaching hardware missing C Require replacement of hardware.

CRUISE CONTROL BRAKE SWITCHES

CRUISE CONTROL CABLES

CRUISE CONTROL CLUTCH SWITCHES

CRUISE CONTROL LINKAGES AND CABLES

Disconnected A Require repair or replacement.

CRUISE CONTROL RESERVOIRS

CRUISE CONTROL TUBES

CRUISE CONTROL VACUUM DUMP RELEASE VALVES

CRUISE CONTROL VACUUM HOSES, TUBES, AND RESERVOIRS

Melted A Require replacement.

CRUISE CONTROL VEHICLE SPEED SENSORS

Wire lead open A Require replacement.

Terminal broken A Require repair or replacement.

FUSE BOXES AND BLOCKS

FUSES, FUSIBLE LINKS, AND CIRCUIT BREAKERS

Cracked, affecting performance A Require repair or replacement.

NOTE: Includes odometers, speedometers, and tachometers (except cable-driven).

Connector melted A Require repair or replacement. See note

GROUND CABLES AND STRAPS

Attaching hardware broken A Require repair or replacement of

HEATING ELEMENTS (DEFROSTERS, DEFOGGERS, ELECTRIC HEATERS,

Condition Code Procedure

HORNS AND SIRENS

Connector melted A Require repair or replacement. See note

KEYLESS ENTRY KEYPADS AND TRANSMITTERS

KEYLESS ENTRY TRANSMITTERS

MIRRORS (ELECTROCHROMATIC AND HEATED)