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Sedans Pontiac Grand Prix Pontiac Grand Prix Heater blower relay switch
144 messages, Last post on Nov 16, 2009 at 6:26 PM
You are in the Pontiac Grand Prix Forum. Your Hosts are pat & karens
I have an '03 Grand Prix, the fan doesn't work at any speed (heat or A/C!) What could be the problem? Could I fix it on my own with used parts? How expensive would it be to do on my own w/ new parts? 
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Replying to: dfarinha (Nov 13, 2007 5:32 am) -did the fan gradually fail, or all at once? -how many miles on the car when this happened? -Have you check the fuses (there's about 4 connected w. the fan, heater system, etc.)? Also, your meesage is under the title 'blown relay switch' so do you think it is that, & WHY??
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Hi, I have a problem , may be some one can help. Rescently I bought Pontiac Grand prix 2000, 50K Miles. My heater doesn't work properly. Sometimes it works and sometimes it doesnt. It is totaly unpredictable and random. Also, I have noticed that engine heat level sometimes goes down. Sometimes it runs almost to the half and then it gous down to quoter. Is it normal? Can it be due to bad thermostat? or any other reason it can be? Apreciate any help or information... Also, I noticed that thermostat is cheap around $12 online. Is it hard to change? Are there any manuals online that you know? |
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| I have a 2003 Grand Prix and like most everyone else out here, my fan slowly stopped working, the last position (5) went out this morning. I replaced the fuses dealing with the fan. The car has approx. 59K miles. Please help. | |
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Replying to: craig32 (Nov 13, 2007 1:59 pm) |
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Replying to: maximka (Nov 19, 2007 12:52 pm) 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!!!
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Replying to: craig32 (Nov 22, 2007 7:30 am) 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.
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Replying to: maximka (Nov 19, 2007 12:52 pm)
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Replying to: mawilliz1 (Nov 25, 2007 1:47 pm) 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. |
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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
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