Test A: The Interior Lamps Are Inoperative

PINPOINT TEST A: THE INTERIOR LAMPS ARE INOPERATIVE

A1:

A2-A5:

A5-A7:

A8-A9:

A10-A12:

A13-A15:

A15-A17:

Normal Operation - Except Stripped Chassis
The instrument cluster monitors the door ajar switch status on circuits 159 (RD/PK), 1034 (BK/WH) and 628 (WH) for a ground supplied through the ajar switches by circuit 57 (BK), indicating an open door. The instrument cluster then grounds circuits 1005 (VT/OG) and 1008 (LG/OG), energizing the battery saver relay and the interior lamp relay. When the relays are energized, voltage is supplied to the interior lamp circuits.

Normal Operation - Stripped Chassis
Circuit 54 (LG/YE) supplies voltage to the headlamp switch. When the interior lamps are turned on, the headlamp switch routes voltage through circuit 53 (BK/LB) to the interior lamps.

Possible Causes
- Fuse(s)
- Circuit 53 (BK/LB) open
- Circuit 54 (LG/YE) open
- Circuit 729 (RD/WH) open
- Circuit 1005 (VT/OG) open
- Circuit 1008 (LG/OG) open
- Circuit 1420 (YE/LB) open
- Instrument cluster
- Interior lamp relay
- Battery saver relay
- Headlamp switch