1979 Blown Fuse
Thread Starter
Cruising
Joined: Jan 2015
Posts: 11
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From: Fort Wayne IN
1979 Blown Fuse
I have a blown fuse for the interior lights/door locks on my 1979 Corvette. I replaced the LH Door Jamb Switch and was ok for about 3 weeks and then the fuse blew again. Any ideas where to look next?
Thanks, Frank
Thanks, Frank
Burning Brakes
Joined: Sep 2005
Posts: 1,044
Likes: 33
Sounds like a orange wire in your courtesy light wire harness has rubbed into a ground.
Race Director
Joined: Apr 2009
Posts: 19,294
Likes: 2,753
From: Charlotte NC
Do you have a wiring diagram??? If not...time to get one.
The left door jamb switch has nothing to do with this problem...they are separate. ASSUMING that your cars wiring is still factory correct and has not been 'modified'
This fuse operates A LOT of things in your car. A cigarette lighter can do it....along with many other things...even the light down by your spare tire carrier.
I DO agree....if you go and replace the fuse and it blows immediately...then your ORANGE wire is touching metal somewhere in the car.
And ...just saying....DO NOT put in a fuse with a higher amp rating...THAT is a BIG NO-NO.
DUB
Thread Starter
Cruising
Joined: Jan 2015
Posts: 11
Likes: 0
From: Fort Wayne IN
Thanks all for the places to look. I do have a power antenna and it is not working. I do have a wiring diagram. I follow it around along with checking the orange wire on the way. Replacing the switch and having it work really made me wonder. I'll follow your suggestions and let you know what I find.
Thanks, Frank
Thanks, Frank
Race Director
Joined: Apr 2009
Posts: 19,294
Likes: 2,753
From: Charlotte NC
Thanks all for the places to look. I do have a power antenna and it is not working. I do have a wiring diagram. I follow it around along with checking the orange wire on the way. Replacing the switch and having it work really made me wonder. I'll follow your suggestions and let you know what I find.
Thanks, Frank
Thanks, Frank
Keep in mind...only because I have to repair this circuit from time to time. And with this courtesy circuit having so many things on it.
IF...when you put the new 20 amp fuse in and it blows....to the left of your fuse panel area is the rear body wiring harness that supplies current to everything in the rear. I disconnect it and put in a new fuse. The reason being....if the fuse does not blow...then you know your problem is in the rear and that SAVES A butt load of time.
Now I have the Power Probe set-up that allows me to not blow fuses trying to find a short. But use fuses if that is all you have. I do know that using a test light can be a pain also..because if you do not remove ALL light bulbs associated with this circuit....you will get a ground signal THROUGH the filaments in the bulbs....which can drive you crazy.
DUB
