Alternator wiring harness - Revisited - The 1947 - Present Chevrolet & GMC Truck Message Board Network

69snb396 · 04-19-2007, 09:15 PM

This morning I was led to toddtheodd's harness modification post through krue's FAQs after I posted a question as titled above. Todd's post was apparently very thorough, however I did encounter a problem this evening when I did the modification to my harness and now have another question. For those who haven't looked at the post, it was originally posted 09-12-2004 at 07:55 AM and is listed among krue's FAQs. My question is: What becomes of the red wire cut from the external regulator plug?? It is not mentioned in the re-wire procedure. After checking for (and finding) continuity between this red wire and the red wire to be connected to the alternator I assumed that the wire was no longer required and cut and capped it and enclosed it in the old harness re-tape. I'd like to get confirmation that this was the right thing to do before I complete the connections and try it out. I'd especially like to hear from toddtheodd and welcome any input from anyone who can help. Thanks.

Madbomber88 · 04-19-2007, 09:40 PM

I just ran out to my truck to check this and when I did this I didn't cut that red wire at all, just kept it attached to the plug. When you are all said and done, the red and white wires are left in the plug and the plug just dangles wherever.
Hope this helps.
I followed that same thread and had no problems and am very happy I did it, made a huge difference.

69snb396 · 04-19-2007, 09:51 PM

Thanks bomber. So from what you've said, abandoned in the plug or abandoned (capped) inside the harness tape is the same. It's probably OK but since it wasn't mentioned I thought "better safe than sorry". Thanks again.

**VetteVet** · 04-19-2007, 09:56 PM

You can eliminate this red wire or use it to connect the alternator to the battery via the 4 way link in the original harness as pictured in the website below. Ignore the horn relay as trucks don't wire it in this way. The diagram is for cars but it's basically the same in trucks.
http://www.madelectrical.com/electri...evymain1.shtml

*rage'nrat638* · 04-19-2007, 09:59 PM

welcome to the board

your really going to love your new alt..

69snb396 · 04-19-2007, 10:12 PM

Thanks vette.

69snb396 · 04-19-2007, 10:13 PM

Thanks rat.

**VetteVet** · 04-20-2007, 12:17 AM

Quote:

Originally Posted by 69snb396

Thanks vette.

you're welcome and welcome to the boards.

04-19-2007, 09:15 PM	#1
69snb396 Registered User Join Date: Mar 2007 Location: Florence, TX Posts: 8	Alternator wiring harness - Revisited This morning I was led to toddtheodd's harness modification post through krue's FAQs after I posted a question as titled above. Todd's post was apparently very thorough, however I did encounter a problem this evening when I did the modification to my harness and now have another question. For those who haven't looked at the post, it was originally posted 09-12-2004 at 07:55 AM and is listed among krue's FAQs. My question is: What becomes of the red wire cut from the external regulator plug?? It is not mentioned in the re-wire procedure. After checking for (and finding) continuity between this red wire and the red wire to be connected to the alternator I assumed that the wire was no longer required and cut and capped it and enclosed it in the old harness re-tape. I'd like to get confirmation that this was the right thing to do before I complete the connections and try it out. I'd especially like to hear from toddtheodd and welcome any input from anyone who can help. Thanks.

04-19-2007, 09:40 PM	#2
Madbomber88 Active Member Join Date: Mar 2004 Location: Virginia Posts: 169	Re: Alternator wiring harness - Revisited I just ran out to my truck to check this and when I did this I didn't cut that red wire at all, just kept it attached to the plug. When you are all said and done, the red and white wires are left in the plug and the plug just dangles wherever. Hope this helps. I followed that same thread and had no problems and am very happy I did it, made a huge difference. __________________ 71 Blazer CST 72 K20 Capt USAF

04-19-2007, 09:51 PM	#3
69snb396 Registered User Join Date: Mar 2007 Location: Florence, TX Posts: 8	Re: Alternator wiring harness - Revisited Thanks bomber. So from what you've said, abandoned in the plug or abandoned (capped) inside the harness tape is the same. It's probably OK but since it wasn't mentioned I thought "better safe than sorry". Thanks again.

04-19-2007, 09:56 PM	#4
VetteVet Msgt USAF Ret Join Date: Jan 2005 Location: Kalamazoo, Michigan Posts: 8,715	Re: Alternator wiring harness - Revisited You can eliminate this red wire or use it to connect the alternator to the battery via the 4 way link in the original harness as pictured in the website below. Ignore the horn relay as trucks don't wire it in this way. The diagram is for cars but it's basically the same in trucks. http://www.madelectrical.com/electri...evymain1.shtml __________________ VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative.

04-19-2007, 09:59 PM	#5
rage'nrat638 Account Suspended Join Date: Mar 2003 Location: THE FALL GUY CHICAGO IL Posts: 5,883	Re: Alternator wiring harness - Revisited welcome to the board your really going to love your new alt..

04-19-2007, 10:12 PM	#6
69snb396 Registered User Join Date: Mar 2007 Location: Florence, TX Posts: 8	Re: Alternator wiring harness - Revisited Thanks vette.

04-19-2007, 10:13 PM	#7
69snb396 Registered User Join Date: Mar 2007 Location: Florence, TX Posts: 8	Re: Alternator wiring harness - Revisited Thanks rat.



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