Troubleshooting Hints

PERFORM BEFORE BEGINNING SYSTEM DIAGNOSIS:
1. Check the RDO Fuse by observing operation of the Radio.
2. Check Inline Fuse A and Inline Fuse B by visual inspection.
3. Check that ground G303 is clean and tight.
4. If switches on one side of Steering Wheel operate but the other side is inoperative, replace Steering Wheel Control Switches.
5. If switches are not backlit with Parklights or Headlights "ON," check Inline Fuse B by visual inspection.
^ 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 (refer to "General Troubleshooting Procedures,"). Diagnostic Aids