Step  | Action  | Yes  | No  | 
|---|---|---|---|
Schematic Reference: Interior Lights Dimming Schematics Connector End View Reference: Lighting Systems Connector End Views , Computer/Integrating Systems Connector End Views in Computer/Integrating Systems, or Power Door Systems Connector End Views in Doors  | |||
1  | Did you perform the Diagnostic System Check - Vehicle?  | Go to Step 2  | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information  | 
2  | 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 in Wiring Systems  | Go to Step 3  | 
3  | Are any other dimmable interior backlighting lamps inoperative?  | Go to Step 4  | |
4  | 
 Did you find and correct a condition?  | Go to Step 10  | Go to Step 5  | 
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  | 
6  | Inspect for poor connections at the harness connector of the DDM. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?  | Go to Step 10  | Go to Step 8  | 
7  | Inspect for poor connections at the harness connector of the memory/heated seat switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?  | Go to Step 10  | Go to Step 9  | 
8  | Replace the DDM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement?  | Go to Step 10  | --  | 
9  | Replace the memory/heated seat switch. Refer to Driver Seat Adjuster Memory Switch Replacement in Seats. Did you complete the replacement?  | Go to Step 10  | --  | 
10  | Operate the system in order to verify the repair. Did you correct the condition?  | System OK  | Go to Step 3  |