Schematic Reference: Interior Lights Schematics

Did you perform the Lighting Systems Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

1. Turn ON the ignition, with the engine OFF.
2. Turn the headlamp switch to the HEAD position.
3. Turn the headlamp switch to the DOME position.
4. Verify the surveillance mode switch is in the OFF position.

Are the Headlamps and Interior lamps ON?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

Disconnect the surveillance mode switch.

Do the Headlamps and Interior lamps turn ON?

Go to Step 5

Go to Step 4

Test for a short to ground in the surveillance mode switch signal circuit. Refer to Measuring Frequency and to Wiring Repairs in Wiring Systems.

Did you find and repair a short to ground in the surveillance mode switch signal circuit?

Go to Step 7

Go to Step 6

Replace the surveillance mode switch. Refer to Emergency Vehicle Interior Switch Replacement .

Did you complete the repair?

Go to Step 7

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Important: Perform the programming procedure for the body control module (BCM).

Replace the body control module (BCM). Refer to Body Control Module Replacement in Body Control Systems.

Did you complete the repair?

Go to Step 7

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2