C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

All relays fried!!!Help....

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Old Jun 6, 2005 | 09:11 PM
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From: 86 Z51 Coupe Branson,MO
Default All relays fried!!!Help....

I have an 86 auto.All of the underhood relays are fried.The car runs extremely rich and only with your foot on the gas.By fried I mean crispy.Any ideas,Help?
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Old Jun 6, 2005 | 09:23 PM
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As in they caught fire? Thats not very fun now is it. I'd be very careful and go one small step at a time replacing things if that is the case.
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Old Jun 6, 2005 | 09:43 PM
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Not on fire but melted.The 2 MAF the one towards the plenum about the same height, and another down on the quarter panel.What could cause this?Not what the other ralays are to.
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Old Jun 6, 2005 | 10:01 PM
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OD,fuel pump and both maf relays on mine had the wire insulation shrink back leaving some with an inch of bare wire. Truley an accident waiting to happen. I suspect yours could have had the same problem and your good luck finally ran out
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Old Jun 6, 2005 | 10:24 PM
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From: 86 Z51 Coupe Branson,MO
Default Relays

My tranny just went.Could this cause anything woth the OD relay?Also the other 3?Thanks
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Old Jun 6, 2005 | 10:53 PM
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Originally Posted by AFogleman
My tranny just went.Could this cause anything woth the OD relay?Also the other 3?Thanks
Something common to them all is at fault. I'd guess a bad connection that caused over heating, thus overloading. Could be on the feed or the ground sides. Also, a short obviously could do it.
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Old Jun 6, 2005 | 11:43 PM
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the early C4s had junk for wiring harnesses...

start by inspecting each circuit an work your way back. You need the factory service manual - www.helminc.com
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Old Jun 7, 2005 | 03:58 AM
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First step I'd take is quit driving it and get a working fire extinguisher close by.

Sounds like the harness is shorted in there. If one circuit shorts, it heats up, and it'll melt the insulation on nearby wires.

Or the header/air tree melted it. They're really close to the harness. The harness for all those runs right through there.

Last edited by CentralCoaster; Jun 7, 2005 at 04:00 AM.
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