Pinpoint Test F: An Individual Demand Lamp Is Inoperative

Interior Lighting

Pinpoint Test F: An Individual Demand 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 power to the demand lamps. The demand lamps remain powered until the battery saver feature times out. Once the timeout has been reached, the LCM removes voltage from the demand lamp.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors
- Courtesy lamp


PINPOINT TEST F: AN INDIVIDUAL DEMAND 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.

NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to Battery, Mounting and Cables Battery Disconnect.

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F1 CHECK FOR VOLTAGE TO THE INDIVIDUAL DEMAND LAMP


- Ignition OFF.
- Disconnect: Inoperative Demand Lamp.
- Measure the voltage between the inoperative demand lamp connector, harness side and ground as follows:









- Is the voltage greater than 10 volts?

Yes
GO to F2.

No
REPAIR circuit 705 (LG/OG) for an open. TEST the system for normal operation.

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F2 CHECK FOR VOLTAGE TO THE DEMAND LAMP USING THE CONNECTOR GROUND


- Measure the voltage between the inoperative demand lamp connector pins, harness side as follows:









- Is the voltage greater than 10 volts?

Yes
INSTALL a new 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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