Need Some help with my window defroster
#1
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Join Date: Jun 2004
Location: MI
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Car: 1994 Pontiac Firebird Formula
Engine: LT1 350 V8
Transmission: 4L60E
Need Some help with my window defroster
hello I don't know if this is were this would go but I think it is. Anyway I live in michigan and it has been raining and geting cold here and I whent to use my front window defroster today and it didn't come on there is no air blowing out of the vents. it is the same when I try to use any seting heat, ac, vent. So my ? is what is going on. Also the other week when I was driving at night the little lite in the rear defroster switch whent out don't know if that is important or not.
#2
Supreme Member
The front controls are vacuum powered I believe. Look under the hood for a vacuum line that is unhooked or broken. Hard to see sometimes look close. Rear defog has a timer in the switch, goes out after a couple minutes. Think this runs on a circuit breaker in the fuse box under the dash, no fuse on it. (edit, your 91 Firebird may have electric heat duct controls, not sure. Sorry if I'm wrong)
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