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Pontiac Grand Prix, Lights, Electrical, Sedan
#76 of 228 NEED HELP!!! A/C blower & head lights
Nov 09, 2007 (6:15 pm)
I have a 2002 pontiac grand prix se 3.1L and i'm having a problem with the A/C blower fan. If I turn the fan switch to settings 1-4 the blower fan will not run and the head lights will go out and if I turn the fan switch to 5 the blower fan and head lights will come on. I have already installed a new fan resistor.
can someone please help me thanks,
#77 of 228 Re: NEED HELP!!! A/C blower & head lights [blown342]
Nov 12, 2007 (7:50 am)
I too am having a problem similar to that which you described, and have changed the resistor, what a pain in the butt. I came across the following information on another forum, in which the individual describes this problem to a tee... I'll be purchasing the wiring harness descibed below today, hope this helps you. Stan
fraubayer04-16-2007, 12:27 AM
Grand Prix GT 2001. AC/Heater fan not working. Replaced the fan blower resistor, didn't fix the problem. Also, when NOT working, if i turn to the fan switch to speeds 1-5 my headlights/daytime running lamps go out along with the fan not responding. Please help! Also, after I got my car back from the shop, the alarm has gone off twice in the past two days for no reason at all. Could that be related to the problem???
richtazz04-16-2007, 07:05 AM
Sounds like a faulty ignition switch/harness assembly. The contacts get weak and start arcing, causing all kinds of electrical gremlins. Refer to the tips and maintenance section for detailed proceedure. here's the link for convenience.
#78 of 228 Re: NEED HELP!!! A/C blower & head lights [sraby]
Nov 19, 2007 (6:23 am)
Just an update... I replaced the ignition switch/wiring harness assembly and have not experienced any of the symptoms described in the previous post since. I must warn you that the instructions described in the link in the previous post, are somewhat inadequate, but for the most part correct. For example, a set of small Torx sockets are required (or a 5/32" socket and patience with a pair of needle-nose pliers) to remove the two screws that secure the upper steering column shroud and switch assembly. Also the small hole to release the key cylinder is located on top on the cylinder housing and the upper shroud can be removed prior to removing the key cylinder. Total time to perform this task was approx 1.5 hours. If you have any questions, let me know
#79 of 228 Re: NEED HELP!!! A/C blower & head lights [sraby]
Nov 20, 2007 (5:37 pm)
Good! I'm going to replace the ignition switch/wiring harness in my car next week. Oh by the way my low coolant light came on yesterday and I found that my coolant has engine oil in it. What a piece of crap!!!
#80 of 228 Re: NEED HELP!!! A/C blower & head lights [blown342]
Nov 21, 2007 (6:51 am)
How many miles do you have on the car? I understand that there are some reporting head gasket problems, you might look into this. I had one blow out on a 1994 Grand Am that I had, thought I blew the engine at the time with all the smoke and steam it produced when it went out.
My 2001 GP has ~ 133400, only 'real' problems that I have had were this wiring harness issue that I believe has been there from the day I purchased the car new and the dealer could not find the problem. O2 sensor, caused the car to stall in traffic one evening during rush hour and a clogged Cat Converter, caused extremely poor sluggish performance.
Hope this switch/harness fixes your problems, shop around for prices... the dealer cost was $139.95 (though I got it for $77, my brother is the parts manager). I've seen them online and at NAPA I think for $75. Stan
#81 of 228 Low beams not working
Nov 24, 2007 (10:28 am)
I have a 2002 Grand Prix. The low beams no longer turn on, but the highbeams and parking lights do. Does anyone have any ideas what could be causing this?
#82 of 228 Re: NEED HELP!!! A/C blower & head lights [sraby]
Nov 24, 2007 (7:37 pm)
I have about 130,000 miles on the car.
I see some coolant by the lower intake manifold so i'm going to pull it off monday.
#83 of 228 Headlights, HUD, & Fan Speeds not working at the same time
Nov 26, 2007 (4:00 pm)
I have a 2002 Grand Prix GT with 81,000 miles and when I recently my HUD started to dim in and out and now my automatic lights and HUD will not work if I have the fan on any speed but off. Everything works when I start the car with the fan in the off position, but as soon as I turn on the fan then the HUD and daytime running lights will not work, so I have to turn the headlights on manually, and the heat will not work at all no matter what.....can somebody help??? Thank You.
#84 of 228 Re: Headlights, HUD, & Fan Speeds not working at the same time [wildfan74]
Nov 28, 2007 (7:00 am)
I'm having the same problem with the fan & lights. I was told it was the ignition switch/wiring harness the part cost $100 dollars advance auto parts. I will let you know the outcome tomorrow afternoon 11/29/07.
#85 of 228 Re: Headlights, HUD, & Fan Speeds not working at the same time [blown342]
Nov 28, 2007 (1:05 pm)
Sounds Great, thank you. My car is actually in the shop right now and I am just hoping that it is something that simple and cheap to fix. Thanks again.