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02-14-2014, 02:43 PM
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#1 |
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Registered User
Join Date: May 2013
Location: Utopia
Posts: 215
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Wiring In Alternator
For those that have the GMPP wiring harness and front accessory drive, how did you wire in the LS alternator into the existing system? (72 C10 here) It is my understanding the GMPP wiring harness has a plug that hooks up directly to the alternator to allow the ECM to regulate its charging. Then it's just a matter of running the charge wire back to the battery, correct? (Or wire it back into the factory splice where the stock alternator tied in?). How did you guys clean up all the old external regulator wiring!
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02-14-2014, 04:19 PM
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#2 |
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Senior Member
 
Join Date: Sep 2005
Location: Lewisville, Nc
Posts: 10,237
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Re: Wiring In Alternator
All u would need to hook up in the 12volt red wire on back of the alterator
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David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube |
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02-14-2014, 05:29 PM
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#3 |
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Fabricate till you "puke"
Join Date: Jun 2002
Location: Ill
Posts: 9,402
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Re: Wiring In Alternator
Yup, the brown wire goes to ECM, The computer will handle that
 Longhorn
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69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears.... |
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02-14-2014, 06:21 PM
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#4 |
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Registered User
Join Date: May 2013
Location: Utopia
Posts: 215
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Re: Wiring In Alternator
But as far as the existing wiring that went to the old external regulator and the old alternator, just leave it unplugged? I was looking at the wiring diagram and it looks like if one unplugged the old alternator it would leave some circuits incomplete, right?
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02-14-2014, 10:24 PM
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#5 |
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Old member
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
Posts: 19,945
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Re: Wiring In Alternator
All I know is they plugged my up and it works fine. I guess I need to look at it closer to see what they did in case I need to work on it.
 
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1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs. |
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02-15-2014, 06:47 PM
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#6 | |
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Fabricate till you "puke"
Join Date: Jun 2002
Location: Ill
Posts: 9,402
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Re: Wiring In Alternator
Quote:
Are you running stock gauges, or is it an idiot lite setup? longhorn
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69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears.... Last edited by crazy longhorn; 02-15-2014 at 06:49 PM. Reason: spelling |
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02-15-2014, 07:08 PM
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#7 |
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Registered User
Join Date: May 2013
Location: Utopia
Posts: 215
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Re: Wiring In Alternator
I am running factory gauges and have an ammeter
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02-15-2014, 09:40 PM
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#8 |
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Fabricate till you "puke"
Join Date: Jun 2002
Location: Ill
Posts: 9,402
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Re: Wiring In Alternator
I do not profess to be the electrical guru....my best "shine", is with a welder in my hand? I send you TTT, for all the info, that the good guys have here
Longhorn
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69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears.... |
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02-17-2014, 10:05 PM
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#9 |
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Old member
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
Posts: 19,945
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Re: Wiring In Alternator
OK here is mine. Not the greatest pictures but it runs back down to the jumper that I did back when I upgraded the old voltage regulator to a internal regulator alternator. It also has the hot wires for the 2 new electric fan relays. The computer wiring is up top.
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1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs. |
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02-17-2014, 11:33 PM
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#10 |
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Registered User
Join Date: Sep 2012
Location: Milwaukie OR
Posts: 135
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Re: Wiring In Alternator
I eliminated all of the original wiring as well as the regulator, because I do not plan on going back to an old set up. Plus I moved my battery to the drivers side in order to make room for my air filter, so it was all changed a bit.
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02-18-2014, 12:50 AM
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#11 |
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Registered User
Join Date: May 2013
Location: Utopia
Posts: 215
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Re: Wiring In Alternator
Good info. Thanks for taking the time to explain, guys!
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