Schematic Reference: Interior Lights Dimming Schematics

Connector End View Reference: Lighting Systems Connector End Views , Data Communication Connector End Views , or Vehicle Access Connector End Views

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

Verify that the memory/heated switch backlighting is inoperative.

Does the memory/heated switch backlighting operate normally?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

Are any other dimmable interior backlighting lamps inoperative?

Go to Interior Backlighting Inoperative

Go to Step 4

1. Place the headlamp switch in the PARK position.
2. Adjust the instrument panel (I/P) dimmer switch to the full intensity position.
3. Test for an open, high resistance, or short to voltage in the memory/heated seat switch illumination control circuit. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct a condition?

Go to Step 10

Go to Step 5

Use a test lamp connected to B+ to backprobe the memory/heated seat switch illumination control circuit terminal at the driver door module (DDM) connector.

Does the test lamp illuminate?

Go to Step 7

Go to Step 6

Inspect for poor connections at the harness connector of the DDM. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 10

Go to Step 8

Inspect for poor connections at the harness connector of the memory/heated seat switch. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 10

Go to Step 9

Replace the DDM. Refer to Control Module References for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 10

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Replace the memory/heated seat switch. Refer to Driver Seat Adjuster Memory Switch Replacement .

Did you complete the replacement?

Go to Step 10

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3