Question about Chevrolet Impala
Ck relay under hood for click when defog button is pushed,if this relay clicks switch and relay should be ok,just found same problem with mine,remove right kick panel where the little fuse box is located and large connector under it i seperated and found burned connector,cut wires on both sides and ran jumper wire,make sure to use proper gauge wire,now mine works good luck
Posted on Sep 29, 2010
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Posted on Jan 02, 2017
sounds like a short. i would check and see if there is any breaks in the defroster lines in the glass. maybe you have a bad connection
Posted on Oct 22, 2009
Testimonial: "Thanks, I'll check those lines."
The 30 amp fusible link located in the drivers side junction block controls power to the rear defoger. It is larger than a regular fuse it is pink and has a clear top.
The easiest thing to check first is just touch the terminal on the rear glass with a 12 volt test light or a DVOM to see if you have power.
Posted on Sep 21, 2009
More than likely something has scratched the film that heats up to do the defrosting, Look to make sure it has both wires attached, and use either a test light (make one out of a 12volt bulb and wire if you do not have one.) See if you have electricity to the wires at the ends. If you do, you have a break in the film. You should be able to see where it is broken or scratched. There is an after market repair kit for this, that is not really expensive.
Posted on Dec 21, 2008
Some auto parts stores sell a adhesive that has copper in it. made by "Permatex" just for that problem. Ask the parts guy.
Posted on Nov 09, 2009
Sounds like a dead short. Disconnect the power to the radio and try the rear defog. Then to determine if it is the radio or the hater, disconnect the heater and put power to the radio. Another simple test is to, at night have the head lights on, turn the radio on see how much the lights dim. Then with the radio off, turn the rear defog on. Then try both. IF either one makes the head lights dim and not recover after a minute or so that devise is the shorted component. Check grounds on the radio and the heater.
Posted on Dec 02, 2009
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