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Old 10-28-2007, 09:00 PM   #1
1LIME69
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Wiring harness Q

My harness that goes to the radiator support has been hacked as a result of external regulator to internal. My question is what is the brown wire that goes back toward the firewall fuse block? Is that my interior power? Or where can I see a wiring schematic?
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Old 10-28-2007, 09:06 PM   #2
clemson71guy
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Re: Wiring harness Q

sorry i cant help you with that but i do live pretty close to you. i live in mt.holly but i have never seen that truck in your avatar around here.
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Old 10-28-2007, 09:23 PM   #3
1LIME69
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Re: Wiring harness Q

What's up neighbor. This truck has been around here since it was new but has been off the road for about 3 years because the inline 6 had a bad cylinder. I have since fixed that with a 525 cid big block. Still not on the road yet waiting on funds. By the way looked at your build, looks good so far. Is that a GM crate motor.
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Old 10-28-2007, 09:31 PM   #4
clemson71guy
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Re: Wiring harness Q

yes its a zz4 350 hope to start seeing you around i think i see a new 67-72 truck here every day.
hope you get your wiring problem figured out
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Old 10-28-2007, 09:35 PM   #5
1LIME69
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Re: Wiring harness Q

Thanks. When do you hope to be on the road?
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Old 10-28-2007, 09:36 PM   #6
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Re: Wiring harness Q

hopefully by the beginning of janurary

Last edited by clemson71guy; 10-28-2007 at 09:36 PM.
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Old 10-28-2007, 09:52 PM   #7
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Re: Wiring harness Q

If my guess is correct then that is the original wire to the external voltage regulator. It comes from the charging light in the dash. If you have a one wire alternator then it is not needed. If you have a regular internal regulated alternator then it shold go like the picture below. It connects where the blue wire is on the alternator.
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Old 10-28-2007, 10:23 PM   #8
1LIME69
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Re: Wiring harness Q

Thanks, I guess I just need to trace it from inside the cab.
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Old 10-29-2007, 12:32 AM   #9
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Re: Wiring harness Q

Maybe this will help you.
Also look here http://www.madelectrical.com/index.shtml
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Old 11-08-2007, 09:12 PM   #10
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Re: Wiring harness Q

I had the same problem with mine took off the volt reg and went to a one wire alternator and hei. the brown wire goes to the excite wire on the alternator
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