ck out electrical forum - The 1947 - Present Chevrolet & GMC Truck Message Board Network

BLUE THUNDER · 10-05-2009, 10:27 PM

Hey guys, I posted a need help wiring alt thread on the electrical side but no one has answered. I figured I might get a better response from folks here who have done this conversion. Any and all help wld be great. Thanks guys.

vtblazer · 10-06-2009, 05:45 AM

What's the question...?

Did you check the FAQ area yet?

I'm sure there's some alt conversion threads there.

Blizz · 10-08-2009, 12:09 PM

You did get a few responses over there, go check em out and see if they answered it, http://67-72chevytrucks.com/vboard/s...d.php?t=365869.

For the rest of you, here's the question:

"I bought a 78 amp three wire alt for a mid 80's truck and have it in the Blazer already. I ran a new 10 ga red wire from the back of the alt to the dist block on the fender(passenger side). I also bought a pig tail to fit the alt. That pig tail has a 10 ga red wire and a 12 ga white wire. My origional pig tail from the factory harness is a blue wire and a white wire. As of now, the alt is not charging because these are not connected to anything. My question is, what do I connect these to? Can I splice into the factory blue and white wire pig tail? Need to fix tonight. Thanks guys"

vtblazer · 10-09-2009, 06:13 AM

Is the new three wire alt internally or externally regulated?

What didn't you go with a one wire alt, does the three wire have some advantage?

10-05-2009, 10:27 PM	#1
BLUE THUNDER Registered User Join Date: May 2007 Location: San Antonio Posts: 993	ck out electrical forum Hey guys, I posted a need help wiring alt thread on the electrical side but no one has answered. I figured I might get a better response from folks here who have done this conversion. Any and all help wld be great. Thanks guys.

10-06-2009, 05:45 AM	#2
vtblazer Registered User Join Date: Oct 2003 Location: Central Vermont Posts: 8,537	Re: ck out electrical forum What's the question...? Did you check the FAQ area yet? I'm sure there's some alt conversion threads there.

10-08-2009, 12:09 PM	#3
Blizz Registered User Join Date: May 2006 Location: San Antonio, Texas Posts: 372	Re: ck out electrical forum You did get a few responses over there, go check em out and see if they answered it, http://67-72chevytrucks.com/vboard/s...d.php?t=365869. For the rest of you, here's the question: "I bought a 78 amp three wire alt for a mid 80's truck and have it in the Blazer already. I ran a new 10 ga red wire from the back of the alt to the dist block on the fender(passenger side). I also bought a pig tail to fit the alt. That pig tail has a 10 ga red wire and a 12 ga white wire. My origional pig tail from the factory harness is a blue wire and a white wire. As of now, the alt is not charging because these are not connected to anything. My question is, what do I connect these to? Can I splice into the factory blue and white wire pig tail? Need to fix tonight. Thanks guys" __________________ '72 K5 CST Blazer 4x4 in perpetual progress '96 2dr Tahoe 4x4 daily driver, Black Bear Performance tune, 285-75-16 Nitto Grapplers, Magnaflow muffler, K&N Air filter, Bilstein Shocks.........E-fan, DT Tri Y or Pacesetter LTs coming soon Last edited by Blizz; 10-08-2009 at 12:12 PM.

10-09-2009, 06:13 AM	#4
vtblazer Registered User Join Date: Oct 2003 Location: Central Vermont Posts: 8,537	Re: ck out electrical forum Is the new three wire alt internally or externally regulated? What didn't you go with a one wire alt, does the three wire have some advantage?



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