C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Rear Window Defogger

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Old Dec 10, 2004 | 04:40 PM
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Default Rear Window Defogger

Having a problem with my 91 coup rear window defogger. When I push the button to turn it on, the light comes on for about 2 seconds and then goes out. Defogger is not working. I checked the connections on the window and struts. Is this a problem in the switch or a broken wire somewhere? Thanks, John.
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Old Dec 10, 2004 | 05:02 PM
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I would think the relay is bad.

do you hear a loud click or something?
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Old Dec 10, 2004 | 11:42 PM
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I don't hear a loud click from any of the buttons
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Old Dec 10, 2004 | 11:43 PM
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Where is the relay?
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Old Dec 11, 2004 | 08:12 AM
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Originally Posted by JohnOH327
Where is the relay?
On my 86 it's behind the center I/P
There is also the circuit breaker in the fuse panel
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Old Dec 13, 2004 | 07:28 AM
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Check the silver relay in the fuse panel box. It's marked.

They have a tendency to work themselves loose and create a short circuit condition. That fixed the problem in my '92.
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