Pinpoint Test S: The Individual Reversing Lamp Is Inoperative

Reversing Lamps

Pinpoint Test S: The Individual Reversing Lamp Is Inoperative

Refer to Wiring Diagram Set 93, Reversing Lamps for schematic and connector information. Diagrams By Number

Normal Operation

When the ignition switch is in the RUN position, voltage is provided to the digital Transmission Range (TR) sensor from the Central Junction Box (CJB). When the transmission is placed in REVERSE (R), the digital TR sensor routes voltage to the reversing lamps.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors


PINPOINT TEST S: THE INDIVIDUAL REVERSING LAMP IS INOPERATIVE

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S1 CHECK FOR VOLTAGE TO THE REVERSING LAMP


- Ignition OFF.
- Disconnect: Inoperative Reversing Lamp.
- Apply the parking brake.
- Select REVERSE.
- Ignition ON.
- Measure the voltage between the LH reversing lamp C487-3, circuit 140 (BK/PK), harness side and ground; or between the RH reversing lamp C488-3, circuit 140 (BK/PK), harness side and ground.




- Is the voltage greater than 10 volts?

Yes
REPAIR circuit 57 (BK) for an open. TEST the system for normal operation.

No
REPAIR circuit 140 (BK/PK) for an open. TEST the system for normal operation.

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