Test A: The Control Illumination Is Inoperative/Always On

PINPOINT TEST A: THE CONTROL ILLUMINATION IS INOPERATIVE/ALWAYS ON

A1-A4:

Normal Operation
Battery voltage is supplied to the headlamp switch through circuit 195 (TN/WH). The instrument panel dimmer switch is an integral part of the headlamp switch. The instrument panel dimmer switch controls a variable voltage which is distributed to the various illumination bulbs through circuit 1045 (DB/WH), central junction box (CJB) fuse 36 (5A) and circuit 19 (LB/RD).

Possible Causes
- Fuse(s)
- Circuit 19 (LB/RD) open or short to voltage
- Instrument panel dimmer switch (part of the headlamp switch)