Pinpoint Test B: An Individual Courtesy Lamp Is Inoperative

Interior Lighting

Pinpoint Tests

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 Smart Junction Box (SJB) provides voltage to the courtesy lamps on circuit CLN26 (BU). The courtesy lamps are grounded through circuit GD139 (BK/YE). The luggage compartment lamp is also on the courtesy lamp circuit. Circuit CLN26 (BU) provides voltage to the luggage compartment lamp, and the lamp is ground through circuit GD139 (BK/YE).

For a concern with the puddle lamps, Go To Pinpoint Test I. Pinpoint Test I: The Puddle Lamp(s) Are Inoperative

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 THE COURTESY LAMP


- Ignition OFF.
- Disconnect: Suspect Courtesy Lamp.
- Operate the courtesy lamps by opening any door.
- Measure the voltage between the suspect courtesy lamp, harness side as follows:





- Is the voltage greater than 10 volts?

Yes
INSTALL a new interior lamp for the suspect lamp. REFER to Interior Lamp - Front Interior Lamp - Front or Interior Lamp - Rear Interior Lamp - Rear. TEST the system for normal operation.

No
GO to B2.

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B2 CHECK CIRCUIT CLN26 (BU) FOR VOLTAGE


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





- Is the voltage greater than 10 volts?

Yes
REPAIR circuit GD139 (BK/YE) for an open. TEST the system for normal operation.

No
REPAIR circuit CLN26 (BU) for an open. TEST the system for normal operation.

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