Pinpoint Test G: The Individual Component Illumination Is Inoperative

Instrument Cluster and Panel Illumination

Pinpoint Tests

Pinpoint Test G: The Individual Component Illumination is Inoperative

Refer to Wiring Diagram Set 71, Cluster and Panel Illumination for schematic and connector information. Diagrams By Number

Normal Operation

The Smart Junction Box (SJB) sends a Pulse Width Modulated (PWM) voltage to the dimmable components through circuit VLN04. Ground is provided through circuits GD111 (BK/BU), GD133 (BK), and GD147 (BK/VT).

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors
- Adjustable pedal switch (if equipped)
- Auxiliary climate control switches (if equipped)
- Clock (if equipped)
- Decklid release switch (if equipped)
- Floor shifter
- Hazard flasher lamp switch
- Headlamp switch
- Rear heated seat switches (if equipped)



PINPOINT TEST G: THE INDIVIDUAL COMPONENT ILLUMINATION 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: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to Battery.

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G1 CHECK THE VOLTAGE TO THE SINGLE ILLUMINATION SOURCE


- Ignition OFF.
- Disconnect: Inoperative Illumination Source.
- Place the headlamp switch to the PARKING LAMPS ON position.
- Rotate the instrument panel dimmer switch to the full illumination position.
- Measure the voltage between the inoperative illumination source, harness side and ground as follows:





- Are the voltages greater than 10 volts?

Yes
TURN the headlamps off. GO to G2.

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

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G2 CHECK THE GROUND CIRCUIT TO THE SINGLE ILLUMINATION SOURCE FOR AN OPEN


- Ignition OFF.
- Disconnect: Negative Battery Cable.
- Measure the resistance between the inoperative illumination source, harness side and ground according to the following table:





- Is the resistance less than 5 ohms?

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

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

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