Pinpoint Test Y: The Individual Reversing Lamp Is Inoperative

Reversing Lamps

Pinpoint Test Y: The Individual Reversing Lamp Is Inoperative

When the reversing lamps relay is energized, voltage is routed to the reversing lamps.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors

- Rear lamp jumper harness

PINPOINT TEST Y : 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.

Y1 CHECK FOR VOLTAGE TO THE INOPERATIVE REVERSING LAMP

- Ignition OFF.

- Disconnect: Inoperative Reversing Lamp.

- Apply the parking brake.

- Select REVERSE.

- Ignition ON.

- Measure the voltage between the LH rear lamp C414-4, circuit CLS10 (GN/BN), harness side and ground, or between the RH rear lamp C417-4, circuit CLS10 (GN/BN), harness side and ground.





Is the voltage greater than 10 volts?

Yes
GO to Y2.

No
REPAIR circuit CLS10 (GN/BN) for an open. TEST the system for normal operation.

Y2 CHECK FOR VOLTAGE TO THE INOPERATIVE REVERSING LAMP USING THE CONNECTOR GROUND

- Measure the voltage between the LH rear lamp C414-4, circuit CLS10 (GN/BN), harness side and the LH rear lamp C414-1, circuit GD148 (BK/YE), harness side, or between the RH rear lamp C417-4, circuit CLS10 (GN/BN), harness side and the RH rear lamp C417-1, circuit GD149 (BK/GY), harness side.





Is the voltage greater than 10 volts?

Yes
REPAIR or INSTALL a new rear lamp jumper harness. TEST the system for normal operation.

No
REPAIR the ground circuit in question for an open. TEST the system for normal operation.