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#1
10-04-2006, 06:37 PM
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Rear Defog Wire
I have a Viper 791xv in my 98 Jimmy, installed it myself last year but didn't hook up the rear defogger because I couldn't find any info on how to. With winter coming again, I'm wondering if anyone knows where I can find the rear defrost control wire?
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#2
10-04-2006, 09:48 PM
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Re: Rear Defog Wire
Quote:
__________________
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#3
10-04-2006, 10:50 PM
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Re: Rear Defog Wire
Hehe. Yeah. I seemed to recall it was a sealed unit last time I had the dash apart, but I'll see what I can figure out and post back. You'd think someone would have this info though... the chilton's book doesn't even have it in the wiring diagrams.
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#4
10-04-2006, 11:09 PM
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Re: Rear Defog Wire
Quote:
__________________
 '99 Blazer LT Loaded, K&N Filter, Pioneer Super Tuner,Viper '98 Pontiac Grand Prix GT, 3.8 '88 K1500 Cheyenne, 5.0, stock, bought new '86 Nissan 720 Trash Truck '69 C/10 step side, 307, all original, second owner, in process of restore. The person who says it cannot be done should not interrurt the person doing it. Share your knowledge. It is a way to achieve immortality. Allen- Paintman Wrenchtwister Broompusher
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#5
10-14-2006, 07:21 PM
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Re: Rear Defog Wire
So I finally got around to looking at this today as daylight was fading. On 98 Blazer/Jimmy/Bravada the back of the manual A/C unit has a 4 wire plug that controls the rear defog. Unfortunately, it's controlled by an IC. Theoretically you could bypass this by sending latched +12 down the wire that doesn't read +12 with the lights on or black. Maybe add a diode for safety sake. However, this is probably the better option:
http://www.the12volt.com/installbay/...82602&get=last Last edited by goser; 10-14-2006 at 11:46 PM.
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