Question about 2005 Chevrolet Cobalt

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Rear defroster not working

Similar to other forums I've seen - when I press the defrost button the green light comes on, but no defrosting actually occurs. Doesn't seem to the be fuze or the light wouldn't turn on, right?

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Check for relay malfunction or defective. also check to see if wire on each side of window is connected to grid on glass

Posted on Nov 10, 2013

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There is a relay should hear it click when you press the button and the ligh comes on. can be in the dash or in the fuse box or behind the fuse box

Posted on Oct 15, 2013

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  • bridgette567
    bridgette567 Oct 21, 2013

    Hi again, can hear the click so the relay is working. Also, no problems with the connectors on the rear window glass. Tore out some carpeting over the weekend to see if there is a burned out wire, but quickly feeling like this is something over my head., particularly when seeing wires leading to the airbags - I do *not* want to start snipping and splicing without being absolutely sure I'm on the correct wire. Any idea of what I'm looking for?

  •  Russ Hill
    Russ Hill Oct 21, 2013

    does it go to a box in the boot gray or black box 2 wires in 2 wires out either side of the box. the box can just go with out warning.if you unplug it the power side should have a reading around 25 ohms if there is none then it has failed. also check the point to the window these are prone to fail but look like they are connected check this if it has gone there you need to get yourself some contact glue for electrical parts. its like liquid silver drys very quickly. if it is to quick drying for you use super glue and put it round the edges of it nice and thick should be fine this way then it should be fine with this stuff using super glue.. give the parts a good clean use some brass cleaner on the part that fits to the screen and wash off. should be fine then.

  •  Russ Hill
    Russ Hill Oct 21, 2013

    this one for US



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SOURCE: rear defrost does not work

one little wire on each side of window sometimes they are loose or get unplugged check there and if not fuses if not relay in fuse box lid of that shows with and where it and they are good luck

Posted on Dec 23, 2008

  • 1 Answer

SOURCE: rear window defroster not working

The top part is the antenna. If the whole thing doesn't work ck this out.

My defroster quit too. I found a wire burned in the connector that is found under the fuse box that is located inside the car on the passenger side kick panel.
You have to remove the entire kick panel to access the large white connector not just the fuse door. The panel just unsnaps as you lift up and out. Start from the panel seam beside the passenger seat and lift up and back. You'll also have to unsnap the carpet there too.
You'll see the white connector that has a lot of wires on it. If you'll unsnap the connector you'll see the burned wire. It will be thicker than the others and purple. Just cut the purple wire on both sides of the connector and splice them together with a piece of wire the same gauge and it will work fine.

Posted on Jan 21, 2009

  • 347 Answers

SOURCE: 2005 impala. Rear window defroster is not working

they have a fuse and a rely make sure the wire end is on the conector on the window

Posted on Oct 02, 2009

  • 2 Answers

SOURCE: 2004 Impala rear window defroster not working

the 30 amp breaker is behind the fuses ....u have to take the glovecompartment out and pull the whole fusebox out if ur hands r too big ....the power seat circuit breaker is there 2

Posted on Jan 07, 2010

  • 23 Answers

SOURCE: rear defrost won't workon cavalier

The Cavalier suffers from the infamous Purple wire problem. when you have this problem, the light comes on and timer works but there is no power at the rear elements. Cause is in the connector on driver's side, behind the carpet near hood release. Pull this carpet down and locate the Purple wire going into a green center of plug to open. Likely the contact is blackened inside, that is cause of the problem. You have two choices...clean the contacts and put plug together and defogger will work, for a while. I took the Purple wire out of the plug and soldered it to the black wire on the other side of the plug...make sure you get the right two wires. Look at the plug. The plug causes a high resistance contact and no voltage gets to rear. To prove it, disconnect one terminal at the window and measure 12Volts, connect the wire and the voltage disappears. Basic Ohm's Law. The plug contact is getting all the voltage. Don't let anyone tell you that you need a new switch, if the light/timer work. That won't fix it.

Posted on Mar 02, 2010

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I had a similar issue on an 05 silverado. Air would only blow out of defrost vents. But this worked for me:

1) Unplug HVAC fuse for 10-30 seconds
2) Start truck
3) A/C comes out defrost - wait about 10 to 15 secs
4) A/C then starts coming out the floor vents for about 5 seconds
5) A/C then starts coming out the dash vents.
6) While the A/C is coming out the dash vents, turn A/C OFF (otherwise it cycles back to defrost for good).
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