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Topic: rear window defogger fuses

in Forum: C3 Electrical

rear window defogger fuses

Posted: 1/31/10 7:59pm Message 1 of 5
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Joined: 12/17/2009
Posts: 3
Vette(s): 1978 and 1982
Is anyone haveing problems with the rear window defrosters on the 82 models?  specifically with the 30amp fuse receptable.  both of my 82 cars have wither blown the fuses or the fuse receptable is full of a black substance  but only in the 30amp fuse place.  thanks Ira


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rear window defogger fuses

Posted: 1/31/10 8:06pm Message 2 of 5
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Oak Creek, WI - USA
Joined: 5/21/2008
Posts: 1965
Vette(s): 1981 Great White Shark. Red Interior, 350/190 hp. PS, PB (SS), A/C CC, T-Tops. Served three years in Active Duty Army, then Retired Air Force after 34 years! Badger State Vettes Car Club. 175,000 Original miles!! Now own a 1998 C-5!
What is the status of the 82 at this moment??  Is it running?  Is it being stored??  Started periodiacly??


rear window defogger fuses

Posted: 1/31/10 8:44pm Message 3 of 5
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20214
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas
The electric grid on the rear window takes a lot of amperage to run. That's why it's on a timer. It's fairly common to see the fuses, and the "receptacle" look like they've been hot. One thing to check is what brand/type of fuses you are using. There are some out there that are NOT blowing at the proper time, which results in overheated wiring/circuits, at the least, and melted cars at the worse...
If you're having a problem with good quality fuses blowing, then there is either a problem with the grid on the glass, or in the wiring somewhere, that is pulling even more amps than normal.



Joel Adams
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rear window defogger fuses

Posted: 2/1/10 6:57am Message 4 of 5
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Sykesville, MD - USA
Joined: 4/27/2008
Posts: 4239
Vette(s): 1979 Corvette Coupe Corvette Light Blue Midnight Blue interior Mirrored Glass T-tops
I don't know if this helps, but on my '79, the rear window defroster quit. After changing out the switch and the relay, we finally found the problem to be the fusebox having come loose from the harness and corroded. Cleaned it up an reattached it and "BAM", everthing back to normal. Just something to think about.
 
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rear window defogger fuses

Posted: 2/18/10 5:48pm Message 5 of 5
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Joined: 12/17/2009
Posts: 3
Vette(s): 1978 and 1982
It is a daily driver, used every day. 


in Forum: C3 Electrical


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