Pinpoint Test B: An Individual Courtesy Lamp Is Inoperative

Interior Lighting

Pinpoint Test B: An Individual Courtesy Lamp Is Inoperative

Refer to Wiring Diagram Set 89, Interior Lamps for schematic and connector information. Diagrams By Number

Normal Operation

The Lighting Control Module (LCM) provides voltage to the courtesy lamps.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors
- Interior lamp


PINPOINT TEST B: AN INDIVIDUAL COURTESY 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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B1 CHECK FOR VOLTAGE TO THE COURTESY LAMPS


- Disconnect the inoperative courtesy lamp.
- Measure the voltage between the inoperative courtesy lamp, harness side and ground as follows:









- Is the voltage greater than 10 volts?

Yes
GO to B2.

No
REPAIR circuit 53 (BK/LB) for an open. TEST the system for normal operation.

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B2 CHECK FOR VOLTAGE TO THE COURTESY LAMP USING THE CONNECTOR GROUND


- Measure the voltage between the inoperative courtesy lamp, harness side as follows:









- Is the voltage greater than 10 volts?

Yes
INSTALL a new courtesy lamp assembly for the one in question. TEST the system for normal operation.

No
REPAIR circuit 57 (BK) for an open. TEST the system for normal operation.

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