Troubleshooting Hints

Perform before beginning System Diagnosis
1. Check ENG/A/C Fuse. If open, check CKT 639, and CKT 59 for a short to ground.
2. Check that ground G105 is clean and tight.
3. Check A/C Compressor Clutch Connector terminals for corrosion.
^ 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 Diagnostic Aids. Diagnostic Aids
^ Refer to System Diagnosis. Testing and Inspection