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 Electrical Diagrams.

Normal Operation

Voltage is routed to the reversing lamps when the reversing lamps relay is energized.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors

- Bulb socket

PINPOINT TEST S : THE INDIVIDUAL REVERSING LAMP IS INOPERATIVE

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

S1 CHECK FOR VOLTAGE TO THE INOPERATIVE REVERSING LAMP

- Apply the parking brake.

- Disconnect: Inoperative Reversing Lamp.

- Ignition ON.

- Select REVERSE.

- For 4-door vehicles, measure the voltage between the LH reversing lamp C487-1, circuit CET47 (BU), harness side and ground; or between the RH reversing lamp C488-1, circuit CET47 (BU), harness side and ground.





- For 5-door vehicles, measure the voltage between the LH reversing lamp C414-4, circuit CET47 (BU), harness side and ground; or between the RH reversing lamp C417-4, circuit CET47 (BU), harness side and ground.





Is the voltage greater than 10 volts?

Yes
GO to S2.

No
REPAIR circuit CET47 (BU) for an open. TEST the system for normal operation.

S2 CHECK THE REVERSING LAMP GROUND CIRCUIT FOR AN OPEN

- For 4-door vehicles, measure the voltage between the LH reversing lamp C487-1, circuit CET47 (BU), harness side and the LH reversing lamp C487-2, circuit GD143 (BK/VT), harness side; or between the RH reversing lamp C488-1, circuit CET47 (BU), harness side and the RH reversing lamp C488-2, circuit GD143 (BK/VT), harness side.





- For 5-door vehicles, measure the voltage between the LH reversing lamp C414-4, circuit CET47 (BU), harness side and the LH reversing lamp C414-1, circuit GD143 (BK/VT), harness side; or between the RH reversing lamp C417-4, circuit CET47 (BU), harness side and the RH reversing lamp C417-1, circuit GD143 (BK/BU), harness side.





Is the voltage greater than 10 volts?

Yes
INSTALL a new bulb socket. TEST the system for normal operation.

No
REPAIR circuit GD143 (BK/VT) or circuit GD143 (BK/VT) for an open. TEST the system for normal operation.