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Wierd electrical problem.

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Old Sep 18, 2009 | 08:46 AM
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Default Wierd electrical problem.

I replace the old rusted LT headers and cobbled together exhaust on my 66 with the Corvette Central exhaust system that included "block hugger" shorty headers. Went for a drive last night, about 10 miles total; made a couple of stops, shutting the car off with no issues. Returned home, and the car stalled and the electrical system was completely dead. Checked the battery and it was good, but no crank; no lights' no electrical anywhere. Checked the connections for the ground, good; positive, good.

Waited about 15 minutes, and everything is back to normal

The only thing I can think of is that the new headers are a bit closer to the starter solenoid, and everything is fed from that. Maybe the solenoid is seeing too much heat from the header. I will try to wrap it and see if that works. Any other ideas; suggestions??????
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Old Sep 18, 2009 | 08:51 AM
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It behaves like a bad connection at the bulkhead where the engine and light harnesses connect to the fuse panel. The terminals in those connections corrode and need to be cleaned (unless all your wiring is pretty new).

Although not directly related to the exhaust system, perhaps the wiring got bumped around while you were working, and now it needs to be checked/reseated?
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Old Sep 18, 2009 | 08:55 AM
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I'm with Jeff. Take the connectors off the firewall side of the fuse panel and give the terminals a good cleaning, both on the fuse panel and on the connectors. The most lilely culprit is the connector to the 12 gauge red wire that comes in from the starter solenoid: that's where all the power to the car enters the fuse panel.
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Old Sep 18, 2009 | 08:56 AM
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Originally Posted by 62Jeff
It behaves like a bad connection at the bulkhead where the engine and light harnesses connect to the fuse panel. The terminals in those connections corrode and need to be cleaned (unless all your wiring is pretty new).

Although not directly related to the exhaust system, perhaps the wiring got bumped around while you were working, and now it needs to be checked/reseated?

This is my "virginal" experience with mid-years. My other Vette is a 2001. By bulkhead, are you referring to the firewall? I will check it out later this afternoon.

Thanks!
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Old Sep 18, 2009 | 09:05 AM
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Originally Posted by LDB C5
By bulkhead, are you referring to the firewall? I will check it out later this afternoon.

Thanks!
Yes. Look under your brake booster/master cylinder between the steering and driver's fender (in that vicinity) and you should see 2 wiring harnesses plugging into the firewall adjacent to each other. These 2 harnesses are the engine harness, and the forward light harness, and they are plugging into the fuse box.

Each is held in place with a small tab above/below the harness connection. Depress both tabs and slip the harness off of the fuse panel. Look for corroded pins on either the harness or the fuse panel. Clean and reinstall.

Be careful not to bend any of the pins when you clean them.
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Old Sep 18, 2009 | 09:53 AM
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Thanks I will check them out later this afternoon.
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Old Sep 18, 2009 | 10:30 AM
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Originally Posted by LDB C5
By bulkhead, are you referring to the firewall?
Firewall?

You obviously haven't seen the results of a fire in a Corvette.......
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Old Sep 18, 2009 | 02:15 PM
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Originally Posted by magicv8
Firewall?

You obviously haven't seen the results of a fire in a Corvette.......
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