This 2004 Pontiac Grand Prix came in with a complaint that the blower had stopped working and the customer saw smoke from under the passenger side of the dash. Inspection at the under hood fuse box found a blown 30 amp fuse.
I replaced the fuse.
The new fuse is the square pink fuse second from the left.
I checked and found the blower would work but made a terrible noise and would not turn off.
Time to change the blower motor and blower motor speed controller. I started by removing the passenger side lower hush panel by removing several push pin retainers.
I removed the courtesy light from the panel.
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Then I could access the motor assembly for removal. Three screws and a harness connector and it was out of there. The blower motor speed controller was put on at the factory by melting retaining bosses to hold the assembly together.
I had to use a screwdriver and pry the unit from the housing and installed the new one with screws to hold it in place.
I also checked and replaced the dirty cabin air filter which is probably what helped cause this problem. Click here to see that post.
im having the same problem. 1 day my blower just simply go off in. Not my blower stays on even on my cars of killing my battery I can’t get a blower too stop! What is my problem?
This car has a blower speed controller and it is likely the cause of your problem. Test the small purple/white wire. It should have a nominal 5-10 volts on it with all connectors installed and the key off. Turning the key on and adjusting the blower speed switch should create a variance in the voltage. If all of that is okay the blower speed controller is faulty.
Sparky, My blower motor keeps running full blast while my car is on or off. Is that simply the resistor? If I replace the resistor only would that fix the problem? I have no control on fan speed as of right now.
Thanks!!
Did you check to see if the fuse was blown? Test the blower speed controller and it’s inputs? Was there any signs of water on the old blower motor?
my heat went out a feww months ago and my ac still worked but now nothing works. i changed my blower motor and it still does not work. the only time i get anytthing out is when my car is going over 45mph. what could be the problem…HELP PLEASE