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12-19-2010
Hey all,
I'm trying to replace the blower motor resistor on my girlfriends 04 grand prix gtp. I have searched a lot on here and on the web for instructions and from what I have found it appears that it's either held in by bolts or plastic rivets. On hers it looks like its the rivets.
My 2 questions are:
1. Is there an easy way to break those rivets?
2. Once I do that how do I re-attach the new resistor?
12-19-2010
Its bolted in with 7/32 bolts, take out the 2 you can see then break the resistor to remove then loosen the 3rd bolt and bolt the new one up only tighting the two you can get to.
12-20-2010
loosen the two close to the fire wall then take the one by its self all the way out.. will work.. Also check your connector allso when we do those we always put new pig tails in also at the dealership
12-21-2010
That way takes too long. Just do What I do takes like 5min.
12-22-2010
Thanks for the replys all. I got it taken care of. Man, that thing is in a tough spot. I was laying with my back on the passenger car seat, head under the dash and my feet up near the headrest! Getting out was the hardest part......I thought I was stuck down there.
12-22-2010
best thing to do when working under the dash is to get some styrofoam and lay it on the floor all the way to the door jamb with the seat all the way back. lay in like you're gonna do a bench press with feet outside the car. that feet near the headrest stuff is a surefire way to fvck up your back.
12-22-2010
Sooo glad I saw this thread, gonna take a look at mine tonight and do a voltage test on it and the blower motor to make sure it is the resistor before i go and buy a part. And I also agree with the foam comment, makes working under the dash 10x less painful the next morning.
12-22-2010
I feel like such a n00b...i couldn't get the harness out of the resistor to test the line, pulled and tugged and even used a pliers. is there some method I'm not aware of to get the harness out?
01-01-2011
Blower not working on 2006 Grand Prix!
Ok, so last weekend, all of a sudden I noticed my blower was not working. So no heat, no defrost! Not good! I've replaced a couple blower motors in the past, so I figure that's what it is. Taking out the blower is pretty easy, other than the fact you have to get in a very awkward position under the dash to get to the blower. And first, I had to pull three pins on the panel right under the dash, (very easy!)
Once I got the access panel off, there are three screws/bolts (they have a hex head, so a nut driver or socket works great,) to take off, then the blower will drop down. There is a connector from the wire harness you will have to remove from the blower as well.
So I took the blower out, and just to test it, I connected two wires to the connector on the blower and touched the other end of the wires to my battery. The blower hummed at full speed, so I guess the blower is fine!
So there is this little module right behind the blower, where the wires come from that were plugged into the blower. That is the blower motor resistor module. In my 2006 Grand Prix, there is a circuit board inside the module. I found out that the module was 99 bucks at the local auto store. Ouch! Well, I certainly did not want to shell out for the part if that was not the problem, so I did a little troubleshooting. on the module, there are connections for Bat, Gnd, sig, M+, and M-. The "sig" is the signal from the instrument panel. as you change the fan speed on the fan speed control, the voltage changes on that pin. So I checked the voltage on that connection with a multimeter, and the voltage was zero volts with the fan turned off, and then the voltage went higher as I turned the knob up for the fan speed. A very small voltage, however. I believe the voltage was less than a volt with the fan speed on max.
To get the harness out of the module, I just pulled on the clip with a special pliers I have, either that, or pry it slightly with a flathead screwdriver, then at the same time, wiggle out the harness.
The module looked to be attached to mounting bosses, and merely heat sealed on to the mounting boss. To remove the module, what worked great for me, is to just take a medium sized flat head screwdriver, pry between the mounting tab, and it will just pop out. Each mounting tab had two holes. Only one was used, for the heat sealed mounting bosses and the other was not used, but I would use the one that is not used for remounting the new one using sheet metal screws.Once you pop out the old one, get under there and put the new one in place. There are two other mounting bosses that will accommodate small sheet metal screws, so use those for remounting the new module. I would use small hex head sheet metal screws. You might have to experiment with sizes.
So once I got my new module in, reattached the harness, remounted the fan and reconnected it, the blower worked like a charm!
Last edited by rockdestination; 01-03-2011 at 09:18 AM. Reason: I added details about my repair job
03-01-2011
So I finally got to a place to tackle my problem again, and after more tugging I finally disconnected the resistor, must just be a tight fit. The new resistor didn't do it, so I ordered a blower motor and this turned out to be the problem. Blower motor literally took me 20 minutes, pull the screws, drop the motor and disconnect, reverse order, done. Feels good to have defrost again
03-09-2011
Hey guys I just tackled this problem so I thought I would post to help out a bit.
I have a 2003 Grand Prix GT
My symtoms were blower levels 1 and 2 not working with 3-5 working just fine.
It was very hard to get the three screws off the old resistor, I unscrewed the one...you will know what one I am talking about, it's the only one that is remotely easy to access. I then just slid the big base plate of the old one out from the two back screws. It came right out and the new one slid into place very easy and securally.
Here is a picture of my old one (on the left) and the new one (on the right)
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Here is a picture of the old one. Obviousally water got under the green cover destroying it.
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Forgot to mention I got the new one off of Ebay for $19
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