Alternator w/ ext reg wiring? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Hooker · 02-19-2007, 02:39 PM

Does anyone have a wireing diagram of a ext regulator alernator? Does the alternator have its own ground wire? Thanks in advance! You guys are great!

dave2953 · 02-19-2007, 02:58 PM

As you are facing the alternator the ground wire should be the wire to the left in the plug. It ties into the same wire that grounds the voltage regulator. Give me a second to post the pic.

EDIT: Here you go

Hooker · 02-19-2007, 03:13 PM

I am having charging problems... I am new to this truck and i am scared that the previous owner did some crazy stuff to the wiring....

Dave... is there 4 wires coming from the alt? the thick red wire, the 2 in the plug and then a ground? am i reading this right?

it is a new voltage reg and the battery is good and the alt is good too

dave2953 · 02-19-2007, 03:17 PM

That's correct. What kind of voltage reading are you getting? Did you just replace the voltage regulator, and if so did you have the battery disconnected?

Hooker · 02-19-2007, 03:27 PM

where do i need to check the voltage at? running or not? i think i had the battery disconnected... that was a few weeks ago!

67ChevyRedneck · 02-19-2007, 03:31 PM

^Sounds like you're having the same problem I'm having. I haven't figured out what's going on yet???

dave2953 · 02-19-2007, 03:31 PM

Check voltage at the battery with the truck running. Should be about 14 or 15 volts.

Hooker · 02-19-2007, 03:38 PM

I am only having about 11.4 volts or so...... so now what?

Hooker · 02-19-2007, 03:48 PM

i am so confused!!! lol

67ChevyRedneck · 02-19-2007, 03:58 PM

Where did you get your voltage regulator?

This is my 3rd one.

Hooker · 02-19-2007, 04:02 PM

From my friendly Advance Auto parts! What all will it take to do an int reg one?

dave2953 · 02-19-2007, 04:05 PM

Here's a link to a great post. This is what I followed to convert mine.

http://67-72chevytrucks.com/vboard/s...d.php?t=119379

Hooker · 02-19-2007, 04:31 PM

this may be a stupid ? but how do u tell if an alt is int or ext regulated?

67chevemall · 02-19-2007, 05:22 PM

I think the number of wires coming out of it but not sure.

Sounds like with 11.4 at the Batt. your alt is not charging. Do the pull the ground off the Batt while it is running and see if the truck dies out

Hooker · 02-19-2007, 05:28 PM

heres one for ya!!! the previous owner bought a int reg and tried to hook it up with the ext reg... i just used the above link and connected it and now i get charging!!!! yeee haw!!! THANKS GUYS!!!

67chevemall · 02-19-2007, 05:58 PM

good deal. Might want to give everything a once over to see if everything is set up right. Aviod future problems

02-19-2007, 02:39 PM	#1
Hooker aka TEX-TOY Join Date: Jan 2007 Location: Kentucky Posts: 127	Alternator w/ ext reg wiring? Does anyone have a wireing diagram of a ext regulator alernator? Does the alternator have its own ground wire? Thanks in advance! You guys are great! __________________ 1969 Chevy C10 SWB w/ disk brakes and soon to be lowered with spindles and springs!!!! Getting a paint job like a Army Chinook Helicopter!!!! HOOKERS RULE!! BRAND NEW WIFE BOUGHT IT FOR ME AS A WEDDING GIFT!!! SHE IS THE BOMB!!!!!!

02-19-2007, 02:58 PM	#2
dave2953 Dave's not here, man Join Date: Jun 2004 Location: Winder, Georgia Posts: 2,000	Re: Alternator w/ ext reg wiring? As you are facing the alternator the ground wire should be the wire to the left in the plug. It ties into the same wire that grounds the voltage regulator. Give me a second to post the pic. EDIT: Here you go __________________ - 2014 VW Jetta - 2015 VW Jetta - 1966 Ford F-250 Last edited by dave2953; 02-19-2007 at 03:06 PM.

02-19-2007, 03:13 PM	#3
Hooker aka TEX-TOY Join Date: Jan 2007 Location: Kentucky Posts: 127	Re: Alternator w/ ext reg wiring? I am having charging problems... I am new to this truck and i am scared that the previous owner did some crazy stuff to the wiring.... Dave... is there 4 wires coming from the alt? the thick red wire, the 2 in the plug and then a ground? am i reading this right? it is a new voltage reg and the battery is good and the alt is good too __________________ 1969 Chevy C10 SWB w/ disk brakes and soon to be lowered with spindles and springs!!!! Getting a paint job like a Army Chinook Helicopter!!!! HOOKERS RULE!! BRAND NEW WIFE BOUGHT IT FOR ME AS A WEDDING GIFT!!! SHE IS THE BOMB!!!!!!

02-19-2007, 03:17 PM	#4
dave2953 Dave's not here, man Join Date: Jun 2004 Location: Winder, Georgia Posts: 2,000	Re: Alternator w/ ext reg wiring? That's correct. What kind of voltage reading are you getting? Did you just replace the voltage regulator, and if so did you have the battery disconnected? __________________ - 2014 VW Jetta - 2015 VW Jetta - 1966 Ford F-250 Last edited by dave2953; 02-19-2007 at 03:23 PM.

02-19-2007, 03:27 PM	#5
Hooker aka TEX-TOY Join Date: Jan 2007 Location: Kentucky Posts: 127	Re: Alternator w/ ext reg wiring? where do i need to check the voltage at? running or not? i think i had the battery disconnected... that was a few weeks ago! __________________ 1969 Chevy C10 SWB w/ disk brakes and soon to be lowered with spindles and springs!!!! Getting a paint job like a Army Chinook Helicopter!!!! HOOKERS RULE!! BRAND NEW WIFE BOUGHT IT FOR ME AS A WEDDING GIFT!!! SHE IS THE BOMB!!!!!!

02-19-2007, 03:31 PM	#6
67ChevyRedneck Hittin E-Z Street on Mud Tires Join Date: Nov 2004 Location: Greenville, SC Posts: 23,090	Re: Alternator w/ ext reg wiring? ^Sounds like you're having the same problem I'm having. I haven't figured out what's going on yet??? __________________ Jesse James 1967 C10 SWB Stepside: 350/700R4/3.73 1965 Ford Mustang: 289/T5-5spd/3.25 Trac-Loc 1968 Pontiac Firebird: Project Fire Chicken! 2015 Silverado Double Cab 5.3L Z71 2001 Jeep Wrangler Sport 4.0L 5spd 2020 Chevrolet Equinox Premium 2.0L Turbo 2011 Mustang V6 ~ Wife's ride American Born, Country by the Grace of God 1967 CST Shop Truck Rebuild! My 1967 C-10 Build Thread My Vintage Air A/C Install Project "On a Dime" Trying my hand at Home Renovation! 1965 Mustang Modifications!

02-19-2007, 03:31 PM	#7
dave2953 Dave's not here, man Join Date: Jun 2004 Location: Winder, Georgia Posts: 2,000	Re: Alternator w/ ext reg wiring? Check voltage at the battery with the truck running. Should be about 14 or 15 volts. __________________ - 2014 VW Jetta - 2015 VW Jetta - 1966 Ford F-250

02-19-2007, 03:38 PM	#8
Hooker aka TEX-TOY Join Date: Jan 2007 Location: Kentucky Posts: 127	Re: Alternator w/ ext reg wiring? I am only having about 11.4 volts or so...... so now what? __________________ 1969 Chevy C10 SWB w/ disk brakes and soon to be lowered with spindles and springs!!!! Getting a paint job like a Army Chinook Helicopter!!!! HOOKERS RULE!! BRAND NEW WIFE BOUGHT IT FOR ME AS A WEDDING GIFT!!! SHE IS THE BOMB!!!!!!

02-19-2007, 03:48 PM	#9
Hooker aka TEX-TOY Join Date: Jan 2007 Location: Kentucky Posts: 127	Re: Alternator w/ ext reg wiring? i am so confused!!! lol __________________ 1969 Chevy C10 SWB w/ disk brakes and soon to be lowered with spindles and springs!!!! Getting a paint job like a Army Chinook Helicopter!!!! HOOKERS RULE!! BRAND NEW WIFE BOUGHT IT FOR ME AS A WEDDING GIFT!!! SHE IS THE BOMB!!!!!! Last edited by Hooker; 02-19-2007 at 03:55 PM.

02-19-2007, 03:58 PM	#10
67ChevyRedneck Hittin E-Z Street on Mud Tires Join Date: Nov 2004 Location: Greenville, SC Posts: 23,090	Re: Alternator w/ ext reg wiring? Where did you get your voltage regulator? This is my 3rd one. __________________ Jesse James 1967 C10 SWB Stepside: 350/700R4/3.73 1965 Ford Mustang: 289/T5-5spd/3.25 Trac-Loc 1968 Pontiac Firebird: Project Fire Chicken! 2015 Silverado Double Cab 5.3L Z71 2001 Jeep Wrangler Sport 4.0L 5spd 2020 Chevrolet Equinox Premium 2.0L Turbo 2011 Mustang V6 ~ Wife's ride American Born, Country by the Grace of God 1967 CST Shop Truck Rebuild! My 1967 C-10 Build Thread My Vintage Air A/C Install Project "On a Dime" Trying my hand at Home Renovation! 1965 Mustang Modifications!

02-19-2007, 04:02 PM	#11
Hooker aka TEX-TOY Join Date: Jan 2007 Location: Kentucky Posts: 127	Re: Alternator w/ ext reg wiring? From my friendly Advance Auto parts! What all will it take to do an int reg one? __________________ 1969 Chevy C10 SWB w/ disk brakes and soon to be lowered with spindles and springs!!!! Getting a paint job like a Army Chinook Helicopter!!!! HOOKERS RULE!! BRAND NEW WIFE BOUGHT IT FOR ME AS A WEDDING GIFT!!! SHE IS THE BOMB!!!!!!

02-19-2007, 04:05 PM	#12
dave2953 Dave's not here, man Join Date: Jun 2004 Location: Winder, Georgia Posts: 2,000	Re: Alternator w/ ext reg wiring? Here's a link to a great post. This is what I followed to convert mine. http://67-72chevytrucks.com/vboard/s...d.php?t=119379 __________________ - 2014 VW Jetta - 2015 VW Jetta - 1966 Ford F-250 Last edited by dave2953; 02-19-2007 at 04:06 PM.

02-19-2007, 04:31 PM	#13
Hooker aka TEX-TOY Join Date: Jan 2007 Location: Kentucky Posts: 127	Re: Alternator w/ ext reg wiring? this may be a stupid ? but how do u tell if an alt is int or ext regulated? __________________ 1969 Chevy C10 SWB w/ disk brakes and soon to be lowered with spindles and springs!!!! Getting a paint job like a Army Chinook Helicopter!!!! HOOKERS RULE!! BRAND NEW WIFE BOUGHT IT FOR ME AS A WEDDING GIFT!!! SHE IS THE BOMB!!!!!!

02-19-2007, 05:22 PM	#14
67chevemall Registered User Join Date: Apr 2003 Location: NB Posts: 3,367	Re: Alternator w/ ext reg wiring? I think the number of wires coming out of it but not sure. Sounds like with 11.4 at the Batt. your alt is not charging. Do the pull the ground off the Batt while it is running and see if the truck dies out __________________ 1968 Chevy C10 307 3ott fleetside 1967 Chevy C/10 V8, 3spd, fleetside lwb.Sold 1967 Chev C/10 step, 383, M21. SOLD

02-19-2007, 05:28 PM	#15
Hooker aka TEX-TOY Join Date: Jan 2007 Location: Kentucky Posts: 127	Re: Alternator w/ ext reg wiring? heres one for ya!!! the previous owner bought a int reg and tried to hook it up with the ext reg... i just used the above link and connected it and now i get charging!!!! yeee haw!!! THANKS GUYS!!! __________________ 1969 Chevy C10 SWB w/ disk brakes and soon to be lowered with spindles and springs!!!! Getting a paint job like a Army Chinook Helicopter!!!! HOOKERS RULE!! BRAND NEW WIFE BOUGHT IT FOR ME AS A WEDDING GIFT!!! SHE IS THE BOMB!!!!!!



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02-19-2007, 05:58 PM	#16
67chevemall Registered User Join Date: Apr 2003 Location: NB Posts: 3,367	Re: Alternator w/ ext reg wiring? good deal. Might want to give everything a once over to see if everything is set up right. Aviod future problems

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