Pinpoint Test W: An Individual Reversing Lamp Is Inoperative

Reversing Lamps

Pinpoint Tests

Pinpoint Test W: An Individual Reversing Lamp Is Inoperative

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

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
- Bulb
- Bulb holder
- Rear lamp assembly



PINPOINT TEST W: AN 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.

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W1 CHECK FOR VOLTAGE TO THE REVERSING LAMP


- Ignition OFF.
- Disconnect: Inoperative Reversing Lamp.
- Apply the parking brake.
- Select REVERSE.
- Ignition ON.
- For Edge, measure the voltage between the LH reversing lamp C451-2, circuit CLS10 (GN/BN), harness side and ground, or between the RH reversing lamp C461-2, circuit CLS10 (GN/BN), harness side and ground.




- For MKX, measure the voltage between the LH reversing lamp C487-1, circuit CLS10 (GN/BN), harness side and ground, or between the RH reversing lamp C488-1, circuit CLS10 (GN/BN), harness side and ground.




- Is the voltage greater than 10 volts?

Yes
GO to W2.

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

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W2 CHECK FOR VOLTAGE TO THE REVERSING LAMP USING THE CONNECTOR GROUND


- For Edge, measure the voltage between the LH reversing lamp C451-2, circuit CLS10 (GN/BN), harness side and the LH reversing lamp C451-1, circuit GD149 (BK/GY), harness side, or between the RH reversing lamp C461-2, circuit CLS10 (GN/BN), harness side and the RH reversing lamp C461-1, circuit GD151 (BK/GN), harness side.




- For MKX, measure the voltage between the LH reversing lamp C487-1, circuit CLS10 (GN/BN), harness side and the LH reversing lamp C487-2, circuit GD149 (BK/GY), harness side, or between the RH reversing lamp C488-1, circuit CLS10 (GN/BN), harness side and the RH reversing lamp C488-2, circuit GD151 (BK/GN), harness side.




- Is the voltage greater than 10 volts?

Yes
INSTALL a new bulb holder (Edge) or rear lamp assembly (MKX). REFER to Rear Lamp Assembly [1][2]Rear Lamp Assembly. TEST the system for normal operation.

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

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