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Old 07-01-2012, 09:40 AM   #1
Stale Trooper
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Exclamation 1978 corvette Courtesy light fuse problem

As you can tell from my signiture, I'm NOT a Corvette guy, so please bear with me.
I'm working on a '78 Vette, and while doing some electrical work under the dash I kept blowing the "Courtesy Lights" fuse. So, I resorted to putting a 20Amp Circuit Breaker in the "Courtesy Lights" fuse position (2nd one down on the Left Side) The circuit breaker immediately gets very hot. (I don't think I have a short, as I knew each time I blew the fuse, I was aware of the cause. and other than that, the fuse was carrying the load) Does anyone on here have a listing of what all this fuse serves? Or can you send me to a link that would show that circuit? Do circuit breakers normally get this hot?

The breaker in use is about 1/4" square, black plastic with round copper lugs that fit into the fuse position. (I think it is made by Dorman)

This car is being raffled off for charity in 3 weeks (July 21,'12) so money is non-existant for buying anything, and time is pretty much in the same catagory. Thanks!
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It's White, with a black grille, a spotlight, and the butt is black. Need a picture? Thought not

Last edited by Stale Trooper; 07-01-2012 at 09:43 AM. Reason: Added more detailed information
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Old 07-01-2012, 03:50 PM   #2
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Re: 1978 corvette Courtesy light fuse problem

Usually the cigarette liters, trunk and/or hood lites and all the courtesy lites.
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Old 07-05-2012, 07:13 AM   #3
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Re: 1978 corvette Courtesy light fuse problem

The problem is solved! I went 'back to the basics', and put a regular 20A fuse in the offending slot. No more problems, and all the lights work! Apparently I just got a defective breaker, as I had the doors open for about 5 hours yesterday, with all the lights on the whole time. Thanks for the input, Maxwedge
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'05 CVPI
(My '99 got wiped out with 238,513 miles on the clock, stupid woman driver)

It's White, with a black grille, a spotlight, and the butt is black. Need a picture? Thought not
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Old 07-05-2012, 07:36 AM   #4
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Re: 1978 corvette Courtesy light fuse problem

Light switch 15 amp fuse circuit brake and check the tail. If you have 55 corvette you have 6 volt electric fuse system, so go for 20 amp which is regular.
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Old 08-04-2012, 01:14 AM   #5
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Re: 1978 corvette Courtesy light fuse problem

What year did the 'vette go to a 12v system?
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Old 08-04-2012, 07:52 AM   #6
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Re: 1978 corvette Courtesy light fuse problem

JoeW & Jeff collision, All GM (and I think Ford & Mopar) went to 12 Volt systems in 1955. The '53-'54 vettes (and the other brands older vehicle models) were 6 Volt systems. I've solved the problem, and, as listed in the first entry, the car has been given away.

NOTE TO MODERATOR: Please close this thread, as we are getting away from the origional question. Thanks Stale Trooper
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(My '99 got wiped out with 238,513 miles on the clock, stupid woman driver)

It's White, with a black grille, a spotlight, and the butt is black. Need a picture? Thought not
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