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#1 |
Registered User
Join Date: May 2015
Location: Kansas
Posts: 61
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Help - Weird Wiring on Regulator
Anybody seen this before? The white and brown wires that are supposed to go to the external regulator plug, (#2 and #4) are spliced together for some reason and Im trying to figure out why and what that would have done to the charging system. Im having battery drain issues and was checking the regulator when I noticed the weird wiring. Just wanted to see if anyone knows why the previous owner might have done this before I go changing it. Im hoping that connecting them back to the regulator plug will fix my issues.
72 C10 w/ 350. |
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#2 |
Registered User
Join Date: Oct 2008
Location: cross hill, south carolina
Posts: 21
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Re: Help - Weird Wiring on Regulator
Is your current alternator an internal regulated one? It looks like someone did a bypass on the external regulator to do the switch. Check the 2 wires on the plug for your alternator as they are probably spliced as well. If you can't see it, you might have to pull back the tape or whatever else you have 9v er your wires to make sure they aren't spliced. If they are you can reconnect everything to go back to external or leave it like it is.
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71 c10 350 sm465 - sold 71 c10 305/th350 - dd |
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#3 | |
Account Suspended
Join Date: Jul 2015
Location: Bisbee AZ
Posts: 43
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Re: Help - Weird Wiring on Regulator
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#4 | |
Registered User
Join Date: May 2015
Location: Kansas
Posts: 61
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Re: Help - Weird Wiring on Regulator
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#5 |
Registered User
Join Date: Apr 2015
Location: Fairbanks AK
Posts: 33
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Re: Help - Weird Wiring on Regulator
Looks like a 10si, internally regulated alternator. Battery drains can be a pain to chase. Can you put an ammeter inline and take out and replace a fuse at a time and see a current draw?
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#6 |
Registered User
Join Date: Jun 2015
Location: @
Posts: 890
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Re: Help - Weird Wiring on Regulator
is it battery drain or not charging if its a drain do the test light trick . disconnect neg side of bat connect one end of light to cable one end to batt then start pulling fuses one at a time till light goes out
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#7 |
Registered User
Join Date: Oct 2008
Location: cross hill, south carolina
Posts: 21
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Re: Help - Weird Wiring on Regulator
Was anything added inside that wasn't stock? New radio, gauges, anything that can draw power? If there is I would start with those things first. If you're still having trouble do like ak808 suggested go through one fuse at a time with a volt meter.
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#8 | |
Registered User
Join Date: May 2015
Location: Kansas
Posts: 61
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Re: Help - Weird Wiring on Regulator
Quote:
Fire...its a battery drain. It seems to charge fine when driving around. As long as I drive it, battery stays good. But after sitting for 2 days or so, itll be drained. Hotroddin....Ive only had the truck for a couple of months and havent added any electronics to it yet. The only aftermarket part I could find was the radio, so I pulled it all out about a week ago hoping that was the solution but battery was dead about 2 days later. Just to make sure, If it connect a test light to the neg battery cable, and the other end to the neg battery post, it should light if I have a draw. Is that correct? |
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#9 |
Registered User
Join Date: Jun 2015
Location: @
Posts: 890
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Re: Help - Weird Wiring on Regulator
yes and it can be very weak if its a slight draw so give it a close look
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#10 |
Registered User
Join Date: Oct 2007
Location: Spanaway
Posts: 8,451
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Re: Help - Weird Wiring on Regulator
I think whats been overlooked here is that if your internally regulated then that plug should be disconnected from the regulator altogether.
There are FAQ threads explaining how to do this in the electrical section Read this thread and look at the second pic in post 13, you can see the 4 prong plug and how its jumpered on the 4 connections.. http://67-72chevytrucks.com/vboard/s...ed+converstion
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Mike. Swamp Rat build thread : http://67-72chevytrucks.com/vboard/s...d.php?t=595019 72 3/4T 4X4 4" BDS Lift 33" BFG's |
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#11 |
Registered User
![]() Join Date: May 2013
Location: WEST PALM FLORIDA
Posts: 1,174
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Re: Help - Weird Wiring on Regulator
Looks like po tried to do a conversion to a internally regulated alt ,,, the wrong way , do your research but Im pretty sure the 2 outside wires are the ones supposed to be spliced , not the ones pictured in your top post
When these are modified most join the brown and blue wires , and the red and white are capped READ THIS http://www.madelectrical.com/electrical-tech.shtml
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68 Long Fleet , ly6 , turbo 350 , 3-5 drop , original paint , front discs 67 Small window , 7 foot bed , tweaked 6.0 LSX 2004R Medium Olive 58 Apache fleet , 235 , offy intake , dual exhaust , 4 on the floor , red/white 69 Long Fleet , Custom , 6.0, 4l60 , AC , Medium Olive Last edited by 67 chevelle; 07-22-2015 at 07:45 AM. |
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#12 | |
Registered User
Join Date: May 2015
Location: Kansas
Posts: 61
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Re: Help - Weird Wiring on Regulator
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#13 |
Registered User
Join Date: Apr 2010
Location: So Cal
Posts: 1,437
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Re: Help - Weird Wiring on Regulator
>> it looks like most have spliced the two outside wires together..................I am going to try to re-splice the v. reg. wires the right way and see<<
I wouldn't do that. One of the reasons I am always trying to discourage guys from making the swap from the original 10DN to a 10SI or 12 SI is because there is never a shortage of people out there that can tell you how to do it incorrectly. The voltage regulator plug you have pictures has pins labeled "F, 2, 3, and 4". The wire to #4 (brown) goes to the dash "Gen" light. That wire is now connected to the #2 wire (white) and completes the Exciter circuit for pin #1 on the new alternator. You can see that in the image below. This is one of VetteVet's great images that he has posted here. His image shows a jumper from pin #3 to pin F. Most guys place that same jumper from alternator pin #2 to the Bat terminal, directly on the SI alternator. Follow the wiring from pin to pin and you should see that it is the same. VetteVet's wiring will provide better regulation, but the other will still work. See if you have that jumper. If you do, the problem isn't in the wiring as you have it pictured.
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'67 GMC 2500, 292, 4spd, AC |
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