Initial Inspection and Diagnostic Overview

1. Check if TURN B/U Fuse is open.
2. Check Brake Switch Assembly for proper adjustment.
3. Make sure G105 is clean and tight.
4. If Transmission Shifter does not shift out of "PARK," check linkage and cable for binding.
^ Check for a broken (or partially broken) wire inside of the insulation which could cause system malfunction but prove "GOOD" in a continuity/voltage check with a system disconnected .These circuits may be intermittent or resistive when loaded, and if possible, should be checked by monitoring for a voltage drop with the system operational (under load).
^ Check for proper installation of aftermarket electronic equipment which may affect the integrity of other systems (see Troubleshooting Procedures). Diagnostic Aids
^ Refer to System Diagnosis.