control module located on a 92 gmc g2500 (Vandura)....before I went into the Drs. Today AC was working fine and when I came out and started the vehicle I had nothing blowing out my vents...heat..ac...or defrost...I have 3 little ones aged ranged from 3 weeks old to 1 year and a 5 year old...can't go long without AC down here in Florida...Any help would be greatly appreciated...I've checked all fuses and everything seems fine...Thanks from me and my family in advance
Cars & Trucks - GMC
Answers & Comments
There is no relay in this vehicle. Power flows from the fuse to the speed switch. For the slower speeds it then flows to the blower motor resistor and then to the blower motor and ground. For high speed power flows from the switch directly to the blower motor and then ground. Check for battery voltage at the switch on the Brown wire. That's incoming power. Also check for good ground on the black wire at the blower motor.
Thank you so very much...your knowledge is greatly appreciated...