Buick Repair Questions? Ask a Mechanic for Answers ASAP
Hello, my name is Bobby. Thank you for the question. Can you give me a full description of what is going on with the car?
Thanks for the response. Please give me a thorough description of what is happening with your car so that I know where to start. Thank you.
Thank you. If the blower is only working on high then most of the time the issue is with the blower resistor module. This is what controls the speed of the fan depending on the output of the HVAC module. If you have a voltage meter you can test it, but this is more than likely the cause.
Hi, My Name is***** have over 20 years experience repairing vehicles. I am a ASE Certified Master Auto Technician. I am confident we can resolve your problem together.Please remember I don't know your skill level. I can't see, smell, hear, or touch the vehicle. It may take a few back and forth replies to get to a satisfactory resolution.I also try to give all of the information you may need expecting a positive rating. If there is any reason I cannot get a positive rating please let me know.
Does this vehicle have automatic or manual a/c?
On the manual A/C you should have 7 wires on the resistor. Can you check them for voltage? The Yellow, Lt Blue & Tan should not be the same. The black is Ground and the PPL should be 12 volts. There is a low blower fuse in the IP fusebox that could be blown. There is a HVAC Module on the lower left side of dash that looks like the likely suspect of your problems.
The HVAC Module is the part where you change the fan and temperatures. are you having any trouble with tail lights?
Try turning the lights on and checking voltage on Row H. Looks like it is fed by the BCM
The blower module is what controls the lower fan speeds. If you pull it and check blower voltages here are the wire colors
All should have 12 volts out of module at the respective speeds
There should be 2 connectors one with 10 wire and one with 7. Look at the one with 7
Lt Blu M2