Schematic Reference: Interior Lights Dimming Schematics

Connector End View Reference: Master Electrical Component List in Wiring Systems

Did you perform the Lighting Systems Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

Verify that the interior backlighting is inoperative.

Does the interior backlighting operate normally?

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

Go to Step 3

Do the park lamps operate correctly?

Go to Step 4

Go to Symptoms - Lighting Systems

Are all of the interior backlighting lamps inoperative?

Go to Step 7

Go to Step 5

Test for an open or high resistance in the following circuits of the inoperative lamp. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct a condition?

Go to Step 11

Go to Step 6

Connect a test lamp between the supply voltage circuit and ground circuit of the inoperative lamp. Refer to Wiring Repairs in Wiring Systems.

Does the test lamp illuminate?

Go to Step 9

Go to Step 8

Test for a short to ground in the instrument panel lamps supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct a condition?

Go to Step 11

Go to Step 8

Inspect for poor connections at the harness connector of the body control module. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 11

Go to Step 10

Replace the affected lamp or internal lamp component.

Did you complete the replacement?

Go to Step 11

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Important: Perform the setup procedure for the BCM.

Replace the body control module (BCM). 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?

System OK

Go to Step 3