Flow of Diagnosis

1. Verify the customer's concern by operating the steering column switch to duplicate the condition.
2. Inspect to determine if one of the following mechanical or electrical concerns apply:
- Damaged steering switch.
- Blown fuse in power distribution box:
+ Fuse 26 (20A)
+ Fuse 27 (30A)
- Circuitry open/shorted

3. If the inspection reveals obvious concerns that can be readily identified, repair as required.
4. If ignition switch concerns remain after the inspection, connect New Generation STAR (NGS) Tester to the data link connector (DLC) located beneath the instrument panel to perform DATA LINK DIAGNOSTIC TEST. If the New Generation STAR (NGS) Tester responds with NO RESPONSE/NOT EQUIPPED for steering column/ignition/lighting (SCIL) module, retrieve continuous diagnostic trouble codes (DTCs) and execute Self Test Diagnostics for the SCIL module.
5. If self test is passed and no diagnostic trouble codes (DTCs) are retrieved, go to Symptom Chart to continue diagnostics.
6. If diagnostic trouble codes (DTCs) are retrieved, go to the Steering Column/Ignition/Lighting (SCIL) Module Diagnostic Trouble Code (DTC) Index to continue diagnostics.
7. If the SCIL module cannot be accessed by the New Generation Star (NGS) Tester, go to Pinpoint Test B.