Inoperative A/C-Heater Control Panel
WARNING: This page is about a different car, the 1996 Buick Roadmaster. However, it is still accessible from the selected car via links, so may be relevant.
- Using a voltmeter, backprobe between A/C-heater control panel connector terminals C12 (Orange wire) and C1 (Black/White wire). If battery voltage is present, go to next step. If battery voltage is not present, check Black/White wire for open or short to battery voltage between terminal C1 and ground. If Black/White wire is okay, check Orange wire for an open or short to ground. If wiring is okay, repair poor mating connection between A/C-heater control panel and control unit connector.
- Turn ignition to RUN position. Using a voltmeter, backprobe A/C-heater control panel connector between terminals C5 (Brown wire) and C1 (Black/White wire). If battery voltage is not present, repair open or short to ground in Brown wire. If battery voltage is present, replace A/C-heater control panel.