Topic: The next issue....
in Forum: C3 Electrical
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Gold MemberClifton, NJ - USA
Joined: 10/3/2003
Posts: 129
Vette(s): 1972 Coupe
Ontario Orange
Black leather interior
LS-5; Turbo 400
My 72 has suddenly developed a penchant for blowing the 5 amp instrument lamp fuse. I really haven't disturbed anything near the Instrument cluster, the center gauge cluster, nor the console. 
Is there a weak point in this circuit that others have dealt with?
Or do I start ripping out each of the possible areas to find the guilty demon? Only one guarantee though, which ever sequence I take, the last area assaulted will be the guilty party.
NJ BB Ken
Is there a weak point in this circuit that others have dealt with?
Or do I start ripping out each of the possible areas to find the guilty demon? Only one guarantee though, which ever sequence I take, the last area assaulted will be the guilty party.
NJ BB Ken
1972 T Top 454; "Boomer" Latest "upgrades": 1 1/8" front Stabilizer bar. Rebuilt SS calipers with O-ring pistons. Under car Chambered exhaust. Fiberglass rear spring (360lbs/in). Bilstein Rear Shocks. 3/4" Rear Stabilizer Bar. Tow hitch. Performer manifold with 600 cfm Holley. Comp Cam 262 .499 lift. L-88 Hood in process
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If it blows as soon as you replace the fuse, you have a hot wire shorted to ground. One of the wires may have just rubbed itself through the insulation and is toching something under the dash. Take out the fuse, gently move the wiring horness around and then install the fuse. If it doesn't pop you'll have your answer. Have a good suplly of fuses handy, this may take a few.
Lifetime MemberBefore getting into the main part of the dash, look at the harness by the radio. It's a point that can cause some problem. It could be the radio itself. If you have an ashtray light, that is a common one as well.
The dash lights have a light grey wire.
The dash lights have a light grey wire.
Gold MemberClifton, NJ - USA
Joined: 10/3/2003
Posts: 129
Vette(s): 1972 Coupe
Ontario Orange
Black leather interior
LS-5; Turbo 400
Just to close out this thread, I found that the stock power connector from the harness has exposed contacts for 12V & the Instrument light circuits.
After taping them up and fastening it to the harness with a wire tie, no more blown fuses!
Thanks Ken S, great call.
NJ BB Ken
After taping them up and fastening it to the harness with a wire tie, no more blown fuses!
Thanks Ken S, great call.
NJ BB Ken
1972 T Top 454; "Boomer" Latest "upgrades": 1 1/8" front Stabilizer bar. Rebuilt SS calipers with O-ring pistons. Under car Chambered exhaust. Fiberglass rear spring (360lbs/in). Bilstein Rear Shocks. 3/4" Rear Stabilizer Bar. Tow hitch. Performer manifold with 600 cfm Holley. Comp Cam 262 .499 lift. L-88 Hood in process
in Forum: C3 Electrical
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