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https://www.youtube.com/watch?v=Cn0HeJP8bZQ
Oct 8, 2012 - Uploaded by GPVlog
04-08 Pontiac Grand Prix - Blower Motor Resistor ReplacementPart 1 ..... Loosen, but do not remove the two frontward screws, then remove the single rearward .... Pontiac Grand Prix StereoRemoval 2004-2008 - Duration: 4:27. by Factory Car Stereo ...Pontiac Grand Am ,HVAC, Heater Fan will not turn on.
You need to check the blower motor to see if it has power going to it.Get volt meter hook the red end to the blower plug and put the black to a ground now turn the key and the fan on and see if you have 12 volts or more.If you do it most likly the blower motor
WITH A TEST LIGHT CHECK THE BLOWER RESISTOR FOR POWER ON THE YELLOW, TAN, PURPLE, AND LIGHT BLUE WIRES. THE ORANGE WIRES CONTROL THE HIGH SPEED CIRCUIT. DO THIS FOR EACH POSITION OF THE BLOWER SWITCH.
THE BROWN WIRE ON THE HVAC CONTROL CONNECTOR 1 POSITION B COMES FROM THE HVAC FUSE 20 AMP. NO POWER ON THAT WIRE WILL CAUSE THE BLOWER TO NOT FUNCTION ON THE LOWER SPEEDS.
Your blower is not shutting off - so your BMCP (Blower Motor Control Processor) has malfunctioned... or the HVAC Control Module has failed.
Both provide power to the blower motor.
To check which one has failed - pull the HVAC control fuse RADIO/HVAC/RFA/CLSTR/ALDL (15Amp) and see if the fan shuts off - if not - try the BMCP fuse HI/BLWR (30Amp) - Both are listed listed at the top of the schematic.
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