Trouble Shooting

Note condition and operation of SECURITY indicator light. If indicator stays on or flashes continuously, see appropriate ANTI-THEFT SYSTEMS article in ACCESSORIES & EQUIPMENT. Check starter solenoid terminals and battery grounds. Check IGN SW 1 (50-amp) fuse, located in left underhood junction block. Check (5-amp) fuse No. 7, located in instrument panel fuse block. For fuse and/or relay identification, refer to illustrations. See Fig 1 -Fig 3 . Check for correct starter usage. See Fig 4 .

Verify customer complaint by operating suspected system. Visually inspect for obvious signs of mechanical and electrical damage. Inspect for loose or corroded connections, damaged wiring harnesses and/or switches. Check for a broken or partially broken wire inside insulation, which could cause system malfunction but prove good in a continuity/voltage check with system disconnected. Ensure any aftermarket electronic equipment is properly installed. If fault is found, repair as necessary. If no fault is found, perform self-diagnostics. See SELF-DIAGNOSTIC SYSTEM  .

Fig 1: Identifying Junction Block No. 1 Fuses & Relays

Courtesy of GENERAL MOTORS CORP.

Fig 2: Identifying Junction Block No. 2 Fuses & Relays

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Fig 3: Identifying Instrument Panel Junction Block Fuses & Relays

Courtesy of GENERAL MOTORS CORP.

Fig 4: Measuring PG260 F1 Starter Length

Courtesy of GENERAL MOTORS CORP.