Schematic Reference: Interior Lights Schematics

Did you perform the Lighting Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

Operate the courtesy lamps to verify the fault is present.

Does the system operate normally?

Go to Testing for Electrical Intermittents in Wiring Systems

Go to Step 3

Remove the courtesy lamp relay

Are the courtesy lamps illuminated?

Go to Step 8

Go to Step 4

Important: The courtesy lamps must be in the OFF position, the doors closed, and 60 seconds must pass before testing this circuit.

Connect a test lamp between the courtesy lamp relay coil control circuit of the courtesy lamp relay connector and a battery positive voltage circuit.

Does the test lamp illuminate?

Go to Step 5

Go to Step 6

Test the courtesy lamp switch signal circuit for a short to ground. Refer to Testing for Short to Ground in Wiring Systems.

Did you find and correct the condition?

Go to Step 11

Go to Step 7

Inspect for poor connections at the harness connector of the courtesy lamp relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 11

Go to Step 9

Inspect for poor connections at the harness connector of the body control module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 11

Go to Step 10

Repair the short to ground in the courtesy lamp relay low control circuit.

Did you complete the repair?

Go to Step 11

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Replace the courtesy lamp relay.

Did you complete the replacement?

Go to Step 11

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Important: Perform the setup procedure for the body control module.

Replace the body control module. Refer to Body Control Module Replacement in Body Control System.

Did you complete the replacement?

Go to Step 11

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Operate the system in order to verify the repair.

Did you correct the condition?

Go to Step 3

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