Question about 2003 Pontiac Bonneville
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Posted on Jan 02, 2017
SOURCE: blower fan only works on high
CHECK THE HVAC CTRL FUSE.
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.
Posted on Jul 14, 2009
The blower control module also known as the blower motor resistor is on the passenger side of the firewall in the engine compartment near the blower
Posted on Nov 12, 2009
Testimonial: "Thank you! You saved me hours of searching under the dash for something that was under the hood! Thanks again. Bill"
Dear Blower Motor Searcher,
The blower motor is located under the dash on the pass side in front.Open the pass front door , get on your knees, and look up under the dash, you will see the flying saucer looking object, that is the blower motor.Right next to it is where the resistor is located, and yes it is recomended that you replace the resistor also because that is where the main current flows thru to get to the blower motor.That actually controls the current of the motor, which controls the speed of the motor, low, med, high, recirc, etc....any other questions get back to me, TX!! HOPE I COULD HELP!!!
Posted on Nov 20, 2009
The blower resistors are the most common cause when it comes to the problem your describing however there could be other causes. It could be a bad speed switch or the wiring between the switch and resistors.
Posted on Jan 13, 2010
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