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. Press the surveillance mode switch.

Do the headlamps and interior lamps turn off?

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

Go to Step 3

1. Disconnect the surveillance mode switch.
2. Install a jumper at the surveillance mode switch connector between the surveillance mode switch signal circuit and ground.

Do the headlamps and interior lamps turn off?

Go to Step 4

Go to Step 5

Test for a high resistance or an open in the ground circuit of the surveillance mode switch. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and repair a high resistance or an open in the ground circuit?

Go to Step 8

Go to Step 6

Test for a high resistance or and open in the surveillance mode switch signal circuit. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and repair a high resistance or an open in the surveillance mode switch signal circuit?

Go to Step 8

Go to Step 7

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

Did you complete the repair?

Go to Step 8

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Important: Perform the setup procedure for the body control module (BCM). Refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control Systems.

Replace the BCM. Refer to Body Control Module Replacement in Body Control Systems.

Did you complete the repair?

Go to Step 8

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2