Pinpoint Test F: One Or More Demand Lamps Are Inoperative

Interior Lighting

Pinpoint Test F: One Or More Demand Lamps Are Inoperative

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

Normal Operation

The Body Control Module (BCM) supplies voltage to the interior lamps when the battery saver feature is not active. This voltage supply is shared with the courtesy lamps. The interior lamps have a dedicated ground circuit that is used for the map lamps to function independently of the courtesy lamp operation.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors

- Interior/map lamps

PINPOINT TEST F : ONE OR MORE DEMAND LAMPS ARE INOPERATIVE

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

F1 CHECK THE COURTESY LAMP OPERATION

NOTE: For vehicles equipped with a moonroof, make sure the interior lamp switches are in the DOOR position before carrying out this step.

- Check the operation of the courtesy lamps with any door open.

Do the courtesy lamps operate correctly?

Yes
GO to F2.

No
GO to Pinpoint Test B Pinpoint Test B: One Or More Courtesy Lamps Are Inoperative.

F2 DETERMINE IF THE FRONT AND REAR DEMAND LAMPS ARE OPERATIVE

- Operate the map lamp function from the front and rear interior lamps.

Is the map lamp function inoperative from both lamps?

Yes
REPAIR circuit GD143 (BK/VT) for an open. TEST the system for normal operation.

No
GO to F3.

F3 CHECK INTERIOR LAMP GROUND CIRCUIT FOR AN OPEN

- Ignition OFF.

- Disconnect: Inoperative Interior Lamp.

- Ignition ON.

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

Inoperative Lamp Connector-Pin Circuit Connector-Pin Circuit Front (with moonroof) C926-3 CLN01 (GN/VT) C926-4 GD143 (BK/VT) Front (without moonroof) C901-3 CLN01 (GN/VT) C901-2 GD143 (BK/VT) Rear C932-3 CLN01 (GN/VT) C932-2 GD143 (BK/VT)






Is the voltage greater than 10 volts?

Yes
INSTALL a new interior lamp in question. TEST the system for normal operation.

No
REPAIR circuit GD143 (BK/VT) for an open. TEST the system for normal operation.