Question about 2002 Pontiac Grand Prix

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REAR WINDOW DEFROSTER WON'T WORK

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Posted on Nov 29, 2012

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Posted on Jan 02, 2017

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SOURCE: Rear windows on 2003 Montana won't close, now

If the lockout switch on drivers door is "OFF"... Window fuse's and relay's may be up under passenger side dash or behind glove box.
Could also be a broken wire in the rubber boot going from the door to the body. You will have to eliminate each till you find the culprit.
The motor and the relay are the most likely to cause this problem. Try swapping the relay with a working window relay. If it still doesn't work, remove the door panel and remove the window motor.
Turn the motor shaft in both directions by hand several turns. Then plug the motor in and see if the switch will now run the motor. Sometimes thats all it takes to get it working again. I have had to do this with brand new motors. If voltage is not present at the motor connector, either a bad switch or a broken wire exsists. Make sure to check for voltage coming to that windows switch. Actually, GM use's a circuit breaker type relay for each window and one fuse for all the circuit breakers.

Posted on Aug 02, 2011

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SOURCE: I have steam coming out of my defroster & it

yOUR HEATER CORE NEEDS TO BE REPLACED. ANTIFREEZE CONTINUALLY RUNS THROUGH YOUR HEATER CORE WITH OR WITHOUT THE HEAT OR AC BEING ON. THIS ALLOWS YOUR ANTI-FREEZE TO COOL ABIT WHEN IT RETURNS TO THE BLOCK.

Posted on Oct 15, 2011

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1 Answer

I've taken out the relay to turn off my front


Are you sure that is not the AC compressor relay?
I don't know your car, but not aware of any cars having a defroster relay, a defogger relay for the rear window with the electric grid in the window, yes. Never heard of a defroster relay.

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I have a 2005 Hyundai Sonata GL v6. The rear window defog/defrost doesn't work. I have checked all fuses & all are good. Also the switch illuminates & I can hear a click in the fuse box located...


There are 2 Plugs that go into the REAR Defrost. If one of them is off, then it will not work. If you broke the Electrical Track, then it needs to be repaired... They sell kits to do this at your local Automotive Repair Stores... Time consuming but easy to do.

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Chevy Avalache 2007 blew a fuse while getting a jump, car won't start, rear windows and power locks don't work


You blew more than 1 .

The HUGE MAXI FUSE is probably burned... IF I remember correctly, it is a 80 or 100 Amp

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My rear wiper does not work what may be the problem? Also I don't think my rear defrost works what may be the problem?


rear wiper check list check fuse or relays or wiring last check the motor its self
window defrost check list fuse relays also check along the matrix of the window this is the liney bits that go from one end to the other for breakes in it check to make sure that the wires and connectors are still atached and still solderd to window this is a common place for them to fail hope this helps ivan

Oct 03, 2012 | 2007 Lincoln Navigator Luxury

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My rear back window won't defrost


make sure the fuse is not blown, also check the connection on your back window

Jun 07, 2012 | 2000 Cadillac DeVille

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My ac quit working (won't even blow), windows won't go up or down and radio wont work only will eject


Hi Kolya, Check around for a loose or broken cable especially around the battery connections. Regards John

Apr 23, 2012 | 1995 Chevrolet Suburban

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I have a 2003 dodge neon..and the rear defroster doesn't work..it has a button for it..and it just shuts off and back windshield doesn't clear at all...even if I keep turning it back on it...


Yeah, I'd think it would have lines, too, unless some new way of doing it that I'm not aware of. Maybe the rear window was replaced with a window without the defrost option. There should be a small two wire connector coming out of the back shelf near lower driver's side of rear window. That would be the defrost connector to the window lines (that aren't there,lol).
Well, good luck with that! I think there are aftermarket kits for rear window defrost, though.

Nov 23, 2011 | 2003 Dodge Neon

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I have a 2001 Alero, rear defrost isn't working at all, frost inside my car, won't defrost and heat isn't working! :( HELP any idea's... I thought it was the heater core but there isn't any leakage un


You definatly have water inside the car. Pull the carpet back in the front and rear checking for water leaks. The only way frost can develope inside a vehicle is the presents of moisture.
The other possibility is your HVAC drain is plugged and water has built up inside the heater motor area. Have the drain checked and cleaned.

Nov 21, 2011 | 2001 Oldsmobile Alero

1 Answer

I have a 1990 Ford Taurus and my blinkers don't


blinkers sounds like the flasher unit is not working. It's located under dash. Also check for burnt out bulbs.
Rear defrost, or rear defogger?: Your defogger for the rear window would run off a relay, probably located in the fuse panel of your car. Often, the connections at the rear window get broke or disconnected.
Front defrost: does your heater blower work?

Oct 28, 2011 | 1990 Ford Taurus

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