Question about 1999 Cadillac DeVille
The blower fan was working prior to taking the car in for a new A/C compressor. After the repair was made, the blower fan stopped working. The ground is good, the red wire has power, but the grey wire from the Heater A/C controller has no voltage. The mechanic says he is not getting any A/C related codes. Does the Heater A/C controller need to be reset and if so, what is the procedure to do so? I appreciate any help.
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Posted on Jan 02, 2017
I would recommend a salvage yard to get a good used one alot cheaper also try this place they carry only GM parts: Schram Auto and truck parts 1-800-292-1032 and also explain to them the problem you are having and these guys can assist you in getting the right part
Posted on Feb 05, 2009
red black and gray are just half the connections. Red is positive 12 volts coming from fuse of circuit breaker. The black wire is either the ground or the main hot wire going to the blower motor (3 pin connection only), and the gray wire (if is is small in size) is a variable voltage coming from the body control module requesting speed for the blower motor.The blower control module varies voltage on the main wire going to the blower motor, supposedly in accordance with the requested voltage from the body control module. Usually if all fuses are okay and present on the apprpriate wire of the blower control module, the a blower motor that will not run or stays running after the key is turned off is the fault of the blower control module. If the blower control module has failed the the cause must be determined (over amping blower motor) or else new blower control module may fail when powered up.Usually blower control modules have more than three wires. Usual connections are: B+ (battery voltage) GND (chassis or engine ground), two large wires going directly to blower motor (can be any color, but are usually 10 guage in size), and an optional wire that reports voltage level back to the body control module.
Posted on May 29, 2009
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