Pinpoint Test C: An Individual Courtesy Lamp Is Inoperative

Interior Lighting

Pinpoint Tests

Pinpoint Test C: An Individual Courtesy Lamp Is Inoperative

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

Normal Operation

Based on the input status, the Smart Junction Box (SJB) supplies voltage to the courtesy lamps on circuit VLN33 (GY/VT). Ground is supplied through circuits GD133 (BK) and GD147 (BK/VT) for the courtesy lamps.

This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Interior lamp



PINPOINT TEST C: 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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C1 CHECK THE INTERIOR LAMP


- Ignition OFF.
- Disconnect: Suspect Interior Lamp.
- Open the driver door.
- Measure the voltage between the suspect interior lamp connector, harness side as follows:





- Is the voltage greater than 10 volts?

Yes
INSTALL a new interior lamp for the lamp in question. REFER to Interior Lamp Service and Repair. TEST the system for normal operation.

No
GO to C2.

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C2 CHECK CIRCUIT VLN33 (GY/VT) FOR AN OPEN


- Measure the voltage between the suspect interior lamp, harness side and ground as follows:





- Is the voltage greater than 10 volts?

Yes
REPAIR the ground circuit for the lamp in question. TEST the system for normal operation.

No
REPAIR circuit VLN33 (GY/VT) for the lamp in question. TEST the system for normal operation.

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