Pinpoint Test F: An Individual Demand Lamp Is Inoperative

Interior Lighting

Pinpoint Tests

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 Smart Junction Box (SJB) supplies voltage to the demand lamps on circuit CLN01 (GN/VT). The demand lamps are grounded through circuit GD133 (BK) or circuit GD149 (BK/GY).

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors
- Interior 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: To diagnose the glove compartment lamp, Go To Pinpoint Test H. Pinpoint Test H: The Glove Compartment Lamp Is Inoperative

NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to Battery.

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F1 CHECK CIRCUIT CLN01 (GN/VT) FOR VOLTAGE


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





- Is the voltage greater than 10 volts?

Yes
GO to F2.

No
REPAIR circuit CLN01 (GN/VT) for an open. TEST the system for normal operation.

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F2 CHECK THE GROUND CIRCUIT FOR AN OPEN


- Disconnect: Negative Battery Cable.
- Measure the resistance between the suspect demand lamp, harness side and ground as follows:





- Is the resistance less than 5 ohms?

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

No
REPAIR the ground circuit in question for an open. TEST the system for normal operation.

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