Pinpoint Test K: The Window Control Switch Illumination Is Inoperative

Instrument Cluster and Panel Illumination

Pinpoint Tests

Pinpoint Test K: The Window Control Switch Illumination Is Inoperative

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

Normal Operation

A variable Pulse Width Modulated (PWM) voltage is supplied to the window control switch from the instrument panel dimmer switch (part of the headlamp switch) when the side, main or parking lamps are on.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors
- Window control switch


PINPOINT TEST K: THE WINDOW CONTROL SWITCH 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.

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K1 CHECK THE WINDOW CONTROL SWITCH ILLUMINATION VOLTAGE CIRCUIT FOR AN OPEN


- Ignition OFF.
- Disconnect: Suspect Window Control Switch.
- With the parking lamps on, rotate the instrument panel dimmer switch to the full illumination position.
- Measure the voltage between the LH window control switch C486-2, circuit 15-AJ9 (GN/BK), harness side and the LH window control switch C486-4, circuit 31-AJ9 (BK), harness side; or between the RH window control switch C487-2, circuit 15-AJ9 (GN/BK), harness side and the RH window control switch C487-4, circuit 31-AJ9 (BK), harness side.




- Is the voltage greater than 10 volts?

Yes
INSTALL a new window control switch. REFER to Glass, Frames and Mechanisms Service and Repair. TEST the system for normal operation.

No
REPAIR circuit 29S-LH53 (OG/BK) for an open. TEST the system for normal operation.

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