Rear Defrost doesn't work, what do i need to replace? - Chevy Impala SS Forum
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post #1 of 12 (permalink) Old 03-22-2010, 08:39 PM Thread Starter
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Rear Defrost doesn't work, what do i need to replace?

My rear window defroster doesnt work anymore. Do i just need to replace the timer? It doesn't turn on at all, and at the end of its life only turned on for a short time before it would turn off.
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post #2 of 12 (permalink) Old 03-22-2010, 11:14 PM
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Your description points to the timer. Check for continuity through the grid, and for voltage to the timer. If you have voltage to the timer, and are not getting anything out of it, the reasonable assumption is that the timer is not functioning.

1991 OCC 461 (.030 over 454) BBC, 3.23 posi, flash to pass, drop spindles & springs, custom fender skirts, stainless full moons, Recaros, Blazer console, MOMO/wood SW w/QR, custom wood shift knob, Pioneer DEH P77DH
1992 OCC now with 5.7 tbi, DEH P77DH
For a parts list, check http://www.impalassforum.com/vBullet...1#post11691762
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post #3 of 12 (permalink) Old 03-23-2010, 02:57 AM
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man, my rear defrost stopped working back in like december...you sure its not like a fuse somewhere, Fred?

I honestly dont have a clue what you said in your post...

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post #4 of 12 (permalink) Old 03-23-2010, 09:27 AM
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Go after the circuit breaker in the fuse box in the dash. Little silver can in the top row. I'm on my third one since I bought the car 6yrs ago. When it goes, it will slowly shorten the amount of time it stays on, until *poof* - no more. Still available from RMS, P/N 12077863, $11.50.

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L99 w/ K&N Cold Air Kit, Home Base Delete w/ 1LE elbow, Impala SS springs and sway bars, MSD coil & wires, filled rear decklid courtesy of Dr. Sinister, 6-way Bonneville front buckets, Jegs catback dual exhaust, working on an Olds Bravada console.
263,000 Miles and counting -now sold 9/10/12
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post #5 of 12 (permalink) Old 03-23-2010, 11:24 AM
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do any of you guys have the part number for the timer if that is what needs to be replaced ? I have had the same problem and I replaced that fuse, thanks
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post #6 of 12 (permalink) Old 03-23-2010, 04:14 PM Thread Starter
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Quote:
Originally Posted by BandGbodies View Post
Go after the circuit breaker in the fuse box in the dash. Little silver can in the top row. I'm on my third one since I bought the car 6yrs ago. When it goes, it will slowly shorten the amount of time it stays on, until *poof* - no more. Still available from RMS, P/N 12077863, $11.50.
Just checked mine. This was the problem. Thanks.
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post #7 of 12 (permalink) Old 03-23-2010, 05:20 PM
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someone scraped the tint off of my back window and i think they scraped one of the defrost lines, is there a fix for that?


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post #8 of 12 (permalink) Old 03-23-2010, 05:44 PM
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Quote:
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someone scraped the tint off of my back window and i think they scraped one of the defrost lines, is there a fix for that?
If they only scraped off one, the rest should work. Depending on how much of it they scraped off, there is a repair "paint". If they took the whole line off, you are probably going to have to live without it.

1991 OCC 461 (.030 over 454) BBC, 3.23 posi, flash to pass, drop spindles & springs, custom fender skirts, stainless full moons, Recaros, Blazer console, MOMO/wood SW w/QR, custom wood shift knob, Pioneer DEH P77DH
1992 OCC now with 5.7 tbi, DEH P77DH
For a parts list, check http://www.impalassforum.com/vBullet...1#post11691762
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post #9 of 12 (permalink) Old 03-24-2010, 05:19 PM
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Quote:
Originally Posted by LT1allday View Post
do any of you guys have the part number for the timer if that is what needs to be replaced ? I have had the same problem and I replaced that fuse, thanks
Try this one: 16191952, but RMS is showning out of stock, and I think that they were discontinued a while back.

Andy

96 Caprice Classic
L99 w/ K&N Cold Air Kit, Home Base Delete w/ 1LE elbow, Impala SS springs and sway bars, MSD coil & wires, filled rear decklid courtesy of Dr. Sinister, 6-way Bonneville front buckets, Jegs catback dual exhaust, working on an Olds Bravada console.
263,000 Miles and counting -now sold 9/10/12
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post #10 of 12 (permalink) Old 03-24-2010, 08:59 PM
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Worst case scenario you could replace the entire rear window.

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