Diagnostic Aids

If engine runs okay, check for faulty light bulb. Check for open circuit No. 419/1234 or blown ALT or GAUGES fuse. A blown fuse will also cause instrument panel-mounted warning lights not to work.

Fig 1: Chart A-1 Schematic - 1993

Courtesy of GENERAL MOTORS CORP.

Fig 2: Chart A-1 Schematic - 1994 Diesel

Courtesy of GENERAL MOTORS CORP.

Fig 3: Chart A-1 Schematic - 1994 Gasoline

Courtesy of GENERAL MOTORS CORP.

Fig 4: Chart A-1 Flow Chart

Courtesy of GENERAL MOTORS CORP.