Test C: The Climate Control Panel Illumination Is Inoperative

PINPOINT TEST C: THE CLIMATE CONTROL PANEL ILLUMINATION IS INOPERATIVE

C1-C2:

C3-C5:

C5-C6:

Normal Operation
When the headlamp switch is placed in the ON position, voltage is supplied to the instrument panel dimmer switch through circuit 14 (BN). The instrument panel dimmer switch then sends a variable voltage to the climate control and the backlighting control system through circuit 235 (RD/BK). The ground signal is supplied to the climate control panel and the backlighting control system through circuit 1205 (BK).

Possible Causes
- circuit 235 (RD/BK) open
- circuit 1205 (BK) open
- manual climate control
- front auxiliary climate control
- rear auxiliary climate control
- EATC panel