Trouble Shooting Hints
On all models, note condition of SECURITY indicator light. If indicator stays on or flashes continuously, see ANTI-THEFT SYSTEM article in ACCESSORIES & EQUIPMENT section. Check starter solenoid terminals and battery grounds. Check for proper installation of aftermarket electronic equipment. Perform self-diagnostic system test, to be certain no trouble codes are stored in PCM memory which may lead to misdiagnosis. See appropriate TESTS W/CODES article in ENGINE PERFORMANCE section:
- TESTS W/CODES - 4.3L
- TESTS W/CODES - 5.0L
- TESTS W/CODES - 5.7L
- TESTS W/CODES - 7.4L
Check 40-amp No. 6 fuse in underhood fuse-relay center, and 10-amp CRANK No. 8 fuse in instrument panel fuse block. Check battery and underhood fuse relay center grounds. See COMPONENT LOCATIONS table.