Problem after removing voltage regulator! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Pac06 · 04-22-2009, 01:55 AM

Hey everyone, I encountered a problem after doing the voltage regulator elimination procedure. I wired my '72 chevy truck exactly how the post about eliminating the regulator stated. When I started the truck after doing this I was getting 17 volts at the battery, normal?? When I went to start the truck the next day the battery was dead. Any suggestions on where I should start checking!! Thanks in advance for the help!!

chuckmc8 · 04-22-2009, 05:57 AM

[ where I should start checking!! [/QUOTE]

Go out and turn off the lights! JK, JK, JK

I just pasted this info from the FAQ page.- it should help-FAQ page has TONS of same kind of info is you havent seen it

Ace in the hole · 04-22-2009, 06:47 AM

you say you eliminated your regulator, I assume you replaced your alternator with an internal regulator and so 17 volts may be on the high side but I think you should be ok. Normal would be 14-16 or even 17 when running. If your battery was run down and the alternator was trying to charge it, making for more of a load on the alternator, it would not surprise me to see 17 volts.

Wrenchbender Ret · 04-22-2009, 04:36 PM

17 volts will burn out your lights, radio, & any sensitive electrical assesories besides ruining the battery. 14-14.5 is max. If you eliminated the voltage reg. you have to use an internal reg. alt. If you did change the alt. it is wired wrong or has a bad internal regulator.

Ace in the hole · 04-22-2009, 04:42 PM

Interesting, my truck runs 15 to 15.5 all the time and have never had a problem. I must be lucky.

jamieg · 04-22-2009, 04:45 PM

Quote:

Originally Posted by Wrenchbender Ret

14-14.5 is max.

x2

overcharging will kill your battery as well

Legolas894 · 04-22-2009, 06:54 PM

Definitely needs a regulator-Should not run that high. What is it with the head lights on?

Lugnut64052 · 04-22-2009, 07:02 PM

Quote:

Originally Posted by wrenchbender ret

17 volts will burn out your lights, radio, & any sensitive electrical assesories besides ruining the battery. 14-14.5 is max. If you eliminated the voltage reg. You have to use an internal reg. Alt. If you did change the alt. It is wired wrong or has a bad internal regulator.

x3

Pac06 · 04-22-2009, 08:22 PM

Internal regulator may be bad....with truck off, key off and connector pulled off the alternator I am reading 2 volts out of terminal 1 on alternator. This draw most likely drained my battery overnight. Is there a way to check the internal regulator??

**truckdude239** · 04-22-2009, 09:16 PM

my f-150 runs 15 volts my chevy runs at the same

04-22-2009, 01:55 AM	#1
Pac06 Registered User Join Date: Jun 2008 Location: San Lorenzo, CA Posts: 27	Problem after removing voltage regulator! Hey everyone, I encountered a problem after doing the voltage regulator elimination procedure. I wired my '72 chevy truck exactly how the post about eliminating the regulator stated. When I started the truck after doing this I was getting 17 volts at the battery, normal?? When I went to start the truck the next day the battery was dead. Any suggestions on where I should start checking!! Thanks in advance for the help!!

04-22-2009, 05:57 AM	#2
chuckmc8 It's alsways something..... Join Date: Nov 2008 Location: Douglasville GA Posts: 1,171	Re: Problem after removing voltage regulator! [ where I should start checking!! [/QUOTE] Go out and turn off the lights! JK, JK, JK I just pasted this info from the FAQ page.- it should help-FAQ page has TONS of same kind of info is you havent seen it Attached Images

04-22-2009, 06:47 AM	#3
Ace in the hole Registered User Join Date: Apr 2007 Location: Kalamazoo, Michigan, USA Posts: 538	Re: Problem after removing voltage regulator! you say you eliminated your regulator, I assume you replaced your alternator with an internal regulator and so 17 volts may be on the high side but I think you should be ok. Normal would be 14-16 or even 17 when running. If your battery was run down and the alternator was trying to charge it, making for more of a load on the alternator, it would not surprise me to see 17 volts. __________________ 1970 K20, 350--- SOLD 05 silverado extended cab short box- duramax Jeep wrangler unlimited

04-22-2009, 04:36 PM	#4
Wrenchbender Ret Registered User Join Date: Oct 2005 Location: Overland Park, Ks. Posts: 5,228	Re: Problem after removing voltage regulator! 17 volts will burn out your lights, radio, & any sensitive electrical assesories besides ruining the battery. 14-14.5 is max. If you eliminated the voltage reg. you have to use an internal reg. alt. If you did change the alt. it is wired wrong or has a bad internal regulator.

04-22-2009, 04:42 PM	#5
Ace in the hole Registered User Join Date: Apr 2007 Location: Kalamazoo, Michigan, USA Posts: 538	Re: Problem after removing voltage regulator! Interesting, my truck runs 15 to 15.5 all the time and have never had a problem. I must be lucky. __________________ 1970 K20, 350--- SOLD 05 silverado extended cab short box- duramax Jeep wrangler unlimited

04-22-2009, 06:54 PM	#7
Legolas894 Chemist under the hood... Join Date: Apr 2009 Location: Fort Erie,ON, Canada Posts: 617	Re: Problem after removing voltage regulator! Definitely needs a regulator-Should not run that high. What is it with the head lights on? __________________ Current fleet: 2013 GMC Sierra, 5.3L, 4x4 1988 GMC Sierra, 305, Auto 1984 Jeep Grand Wagoneer, 360 V8 1997 VW Cabrio, 2.0L 2017 Toyota Rav4, 2.5L Stuff I wish I still had: 2013 Toyota Matrix [RIP] 1967 GMC 910 Fleetside, 283 V8 [1st Love-SOLD] 1987 Jeep Cherokee Laredo 4X4, 4.0 I-6 [SOLD} 1994 Chevrolet Caprice Classic, 5.7LV8 [SOLD] 1995 Chevrolet Astro AWD, 4.3L V6 (RIP) 1998 Chevrolet Suburban 4x4, 5.7L V8 [SOLD]

04-22-2009, 08:22 PM	#9
Pac06 Registered User Join Date: Jun 2008 Location: San Lorenzo, CA Posts: 27	Re: Problem after removing voltage regulator! Internal regulator may be bad....with truck off, key off and connector pulled off the alternator I am reading 2 volts out of terminal 1 on alternator. This draw most likely drained my battery overnight. Is there a way to check the internal regulator??

04-22-2009, 09:16 PM	#10
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,237	Re: Problem after removing voltage regulator! my f-150 runs 15 volts my chevy runs at the same __________________ 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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