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Topic: rear window defogger fuses

in Forum: C3 Electrical


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rear window defogger fuses (1/5)
 1/31/10 10:59pm
penmanf
Former Member

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Vette(s):
1978 and 1982


Joined: 12/17/2009
Posts: 3

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 (2/5)
 1/31/10 11:06pm
dskopp
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Oak Creek, WI - USA

Vette(s):
1981 Great White Shark. Red Interior, 350/190hp. PS, PB (SS), A/C CC, T-Tops, Going to remain as Stock as possible. Served three years in Active Duty Army, then Retired Air Force after 34 years! Badger State Vetts Car Club. 175,000 Original miles!!


Joined: 5/21/2008
Posts: 1958

What is the status of the 82 at this moment??  Is it running?  Is it being stored??  Started periodiacly??

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rear window defogger fuses (3/5)
 1/31/10 11:44pm
Adams' AppleLifetime Member
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Duncanville, TX - USA

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


Joined: 11/8/2003
Posts: 20128

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.


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Joel Adams
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rear window defogger fuses (4/5)
 2/1/10 9:57am
Jaws79Lifetime Member
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Sykesville, MD - USA

Vette(s):
1979 Corvette Coupe Corvette Light Blue Midnight Blue interior Mirrored Glass T-tops


Joined: 4/27/2008
Posts: 4238

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.
 
Barry
 
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rear window defogger fuses (5/5)
 2/18/10 8:48pm
penmanf
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Vette(s):
1978 and 1982


Joined: 12/17/2009
Posts: 3

It is a daily driver, used every day. 

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