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Pontiac Grand Prix Heater blower relay switch

216 messages,  Last post on Jan 05, 2013 at 9:46 AM

You are in the Pontiac Grand Prix Forum.

What is this discussion about? Pontiac Grand Prix, Sedan

Messages Page 9 of 22

#76 of 216 Re: Grand Prix 2000 GT Coupe , Heater Problem [maximka] by craig32

Nov 22, 2007 (8:30 am)

Replying to: maximka (Nov 19, 2007 1:52 pm)
Although i can't advise on the heater problem (since mine is broken, too), I can tell you about the engine heat level:
 
I had also wondered if going to the 1/2 way point was normal,...apparently it IS!
Our '02 always , at MOST, goes to the 1st notch after the 1/2 way mark of th temp guage, then creeps back, sometimes jus a little, other times to the 1/4 mark, th eecooler mark, depends on car speed/outside temp, etc.
 
When i rented a pontiac/chevy cars before, they ALL stayed around the 1/2 point,..so i am secure with it (my '72 charger usually only ran at the 1/4 cool mark, so each car's different!).
 
We need people that have had the heater fan problem, & fixed it to tell us what caused it!!!

#77 of 216 Re: Grand Prix 2000 GT Coupe , Heater Problem [craig32] by mawilliz1

Nov 25, 2007 (2:47 pm)

Replying to: craig32 (Nov 22, 2007 8:30 am)
I had a similar problem with my blower on my 2002 GP GT. The blower would work on 3-5 but not on settings 1 or 2. I had to replace my blower motor resistor. It is a relatively cheap part from autozone.
 
It is located under the glove copartment on the passenger side. you have to take out the three plugs holding the carpet on then look back behind the blower motor. take off the three screws holding on the blower motor, that way you can get to the resistor. take off the only screw on the front of the resistor assy. , then use a 7/32 wrench and ease the screw that you can see out of the back of the assy. then just use plyers and take it out. then just do every thing in reverse to put the new one back in!!!
 
it really sucks and is a bitch to get out took me about an hour. I think some swivle sockets would really help, I just dont have them.

#78 of 216 Re: Grand Prix 2000 GT Coupe , Heater Problem [maximka] by mawilliz1

Nov 25, 2007 (3:01 pm)

Replying to: maximka (Nov 19, 2007 1:52 pm)
The thermostat is not hard to change. follow the top hose from the radiator to the engine. Where it connects to the engine, it will either have 2 or 4 bolts or a hose clamp or both. take the hose off the engine and the thermostat will be right inside. pop the old one out and pop the new one in. voila!

#79 of 216 Re: Grand Prix 2000 GT Coupe , Heater Problem [mawilliz1] by craig32

Nov 25, 2007 (10:04 pm)

Replying to: mawilliz1 (Nov 25, 2007 2:47 pm)
Keep in mind, though, that there's a trick to this:
 
you can use small jumper wires to 'check' first that replacing the resistor willl fix the problem, 1st (meaning don't permenantly install it, just run wires thru it, from the resistor to the blower motor, and from the resistor to the resistor wire harnass that comes from under the dash.
 
That's what i did, 1st, so i could return the resistor ( also tried it with a new blower motor), in case these items weren't to blame after all (& in my case, they were NOT defective).
 
That way you can return them to the auto store!!/get refund.

#80 of 216 Fan Switch, Headlights, & Heads up display by wildfan74

Nov 26, 2007 (4:43 pm)

I have a 2002 Grand Prix GT with about 81,000 miles and lately my heads up display and daytime running lights will not work if I have the fan on any speed, but if I start the car with the fan off then they both work, but as soon as I turn on the fan to any speed then the heads up display goes completely black and turns off and my daytime running lights do not work, I have to turn on the headlights manually, plus when I do have the fan on, there is no heat.....please help. I am having my mechanic look at it tomorrow

#81 of 216 Re: Fan Switch, Headlights, & Heads up display [wildfan74] by mawilliz1

Nov 26, 2007 (6:06 pm)

Replying to: wildfan74 (Nov 26, 2007 4:43 pm)
Sounds like you have a power feed problem,check the battery cable connections,also check the positive battery lead that goes from the battery to the underhood electrical center,just trace the smaller positive wire to the center,make sure its clean and tight,also check the 60A maxifuse for the headlamps,this fuse controls both headlamps and HVAC control,pull the fuse out and check for burned terminals or melting,i believe your problem is at that electrical center.

#82 of 216 Re: Fan Switch, Headlights, & Heads up display [mawilliz1] by wildfan74

Nov 27, 2007 (7:23 am)

Replying to: mawilliz1 (Nov 26, 2007 6:06 pm)
Thank You, I will take a look at the electrical center and see if I can find anything. I have already had my mechanic look at it and he couldn't find anything that appeared to be bad, but he did clean up the ground connection and everything worked better than ever for about a half of a day, and then it all went down hill again from there. I want to think that it has something to do with the HVAC since everything else works until you want to turn on the fan, that is when the auto lights and HUD stop working immediatley and the fan still doesn't work no matter what speed you have it on.

#83 of 216 Failing powered seat 2003 GP by bizboo45

Nov 27, 2007 (8:26 am)

Can anyone help???
My powered seat on the drivers side is stuck almost all the way forward. I'm 6'8" tall so it causes a bit of a problem while driving.
When I try to make the seat move back, only one side of the seat moves...the other side does not. Anyone know what may be causing this?
 
Anyone else who owns a GP think that the bottoms fall out of these things after about 80K miles or so? It seems like I am having one problem after another!

#84 of 216 Re: Fan Switch, Headlights, & Heads up display [wildfan74] by pugsmom

Dec 04, 2007 (7:46 am)

Replying to: wildfan74 (Nov 27, 2007 7:23 am)
I am curious if this worked for you or if you found out what your problem was. My 2000 Grand prix is doing the same thing (heater/ac blower not working and when I turn on the heater my auto headlights do not work) and we can not find where the issue is....

#85 of 216 Re: Fan Switch, Headlights, & Heads up display [pugsmom] by appjej123

Dec 05, 2007 (2:01 pm)

Replying to: pugsmom (Dec 04, 2007 7:46 am)
I don't have the heads up display, but replacing the ignition wires resolved all fan\auto headlights and such.
 
I took my mechanic an article from this site and he fixed it right up.
 
Should work for you as well!

Messages Page 9 of 22

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