Initial Inspection and Diagnostic Overview

1. Check ENG EMIS Fuse. If open, check CKT 241, CKT 459 and CKT 59 for a short to ground.
2. Check that ground G117 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 failure but prove "GOOD" in a continuity/voltage check.
^ Check for proper installation of aftermarket electronic equipment which may affect the integrity of other systems.