Pinpoint Test E: The Demand Lighting Is Inoperative

Interior Lighting

Pinpoint Tests

Pinpoint Test E: The Demand Lighting 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 through circuit 705 (LG/OG). The demand lamps are grounded through circuit 57 (BK). The demand lamps remain powered until the battery saver feature times out. Once that time-out has been reached, then the LCM removes voltage from circuit 705 (LG/OG).

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors
- LCM



PINPOINT TEST E: THE DEMAND LIGHTING 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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E1 CHECK THE COURTESY LAMP OPERATION


- Ignition OFF.
- Open the driver door.
- Do the courtesy lamps illuminate?

Yes
GO to E2.

No
Go To Pinpoint Test A. Pinpoint Test A: The Courtesy Lamps Are Inoperative

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E2 CHECK CIRCUIT 705 (LG/OG) FOR AN OPEN


- Disconnect: LCM C2145c.
- NOTE: If the fuse fails, repair circuit 705 (LG/OG) for a short to ground.
- Connect a fused jumper wire between the LCM C2145c-4, circuit 54 (LG/YE), harness side and the LCM C2145c-18, circuit 705 (LG/OG), harness side.




- Operate any demand lamp.
- Does the demand lamp illuminate?

Yes
LEAVE the jumper wire connected. GO to E3.

No
REMOVE the jumper wire. REPAIR the circuit. TEST the system for normal operation.

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E3 CHECK CIRCUIT 57 (BK) FOR AN OPEN


- Open the glove compartment.
- Does the glove compartment lamp illuminate?

Yes
REMOVE the jumper wire. REPAIR the circuit. TEST the system for normal operation.

No
REMOVE the jumper wire. GO to E4.

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E4 CHECK FOR CORRECT LCM OPERATION


- Disconnect all the LCM connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the LCM connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?

Yes
INSTALL a new LCM. TEST the system for normal operation.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.

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