Makin' too many volts????? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jdhcth · 03-06-2007, 01:29 PM

What could be causing me to make too many volts? At ilde I'm fine, around 12 volts, but at speed it pegs the volt meter out. The voltage regulator is just a few months old and my "GENERATOR" light does not come on like it did when the old reg had gone out before.

Its too many volts for the radio too, it will only come on when the RPMs go back down and the volt meter reads 12v.

HELP!!!!

JD

bobthecop · 03-06-2007, 01:34 PM

It should run around 14 volts any more and the regulator is not working

jdhcth · 03-06-2007, 01:46 PM

Yea, but what's makin' my regs go out so often? The Alternator is new, well a new rebuilt, and this regulator was a high-dollar Borg Warner, previous one was a cheapy.

Maybe I'm overlaoding the 60Amp alternator? All I've added was the stereo and it ran great for 2-3 months. Before that I didn't even have a stereo and it still seemed to kill regulators.

JD

67ChevyRedneck · 03-06-2007, 01:51 PM

My truck would overcharge and undercharge randomly. It would jump to 18V while running, and then fall to 10V. It was retarded. After cleaning wires, having the alternator checked, and swapping out 3 voltage regulators I finally converted to an internally regulated alt. out of a mid 80's silverado. I think they at 90 amp alts. No more voltage regulator.

Click the linky to see more

http://67-72chevytrucks.com/vboard/s...d.php?t=230011

Fred T · 03-06-2007, 04:31 PM

Are your alternator and regulator the same amp rating?

724x4a/cchevy · 03-06-2007, 04:45 PM

im kinda in the same boat as you. "Project Bluebird" jumps really hard continuously from 12 to 14 volts. Makes the lights flicker when at idle.

As2rd · 03-06-2007, 04:46 PM

I am also suffering from this problem. The volt gauge is reading 13.5 when the engine is running and 13v when its off. My 5amp fuse keeps on blowing out when i hook up the memory wire to the battery

. Any suggestions?---Andy

76bonanza · 03-06-2007, 04:54 PM

As stated before you should have around 14.5 volts with the alt running. that is normal any more than 14.5 and you have problems.

As2rd · 03-06-2007, 07:36 PM

does anyone else know why my radio's memory fuse keeps blowing out? Its a custom autosound and i just got it back from tech support which they replaced a crystallized wire. Im thinking about adding a 2ohm resistor but that will take away voltage, Will it still be ok to do? or is there another way? ---Andy (sorry bout the thread jack

)

jdhcth · 03-06-2007, 07:45 PM

OK. I got home and unplugged the Reg and plug an old one in, that DOES make my Generator light come on because it doesn't make enough voltage. I stayed around 12-13 volts like it's supposed to regardless of the RPMs. So the problem IS my new, expensive voltage regulator. Plugged it back in knowing I need a new one tomorrow.

Well, as electrical system go, as I plugged it back in I have normal voltage.

Like nothing was ever wrong.

Maybe it needed to reset itself, who knows?

On the subject of a new style one wire 90-100 AMP Alternator, what make them so special? I mean it still has a voltage regulator, just internal. These don't go out as often????WHY?

Thanks all,

JD

msgross · 03-06-2007, 08:21 PM

one was designed in the 60's and the other in the 80's maybe? i'm switching as well...

84_4x4 · 03-06-2007, 08:51 PM

Quote:

Originally Posted by jdhcth

What could be causing me to make too many volts? At ilde I'm fine, around 12 volts, but at speed it pegs the volt meter out. The voltage regulator is just a few months old and my "GENERATOR" light does not come on like it did when the old reg had gone out before.

Its too many volts for the radio too, it will only come on when the RPMs go back down and the volt meter reads 12v.

HELP!!!!

JD

you have to good of a ground lol rust your ground wire and should charge normally

tracterman2 · 03-06-2007, 09:23 PM

just get rid of all of it and put on a one wire internally regulated alternator...you can pick them up for around 95 bucks or less and I think they are between 80 and 100 amps, so they'll take most anything...you may also check all your wiring under hood and dash...a short that only shorts from time to time will cause a load unload problem with regulators

03-06-2007, 01:29 PM	#1
jdhcth Registered User Join Date: Dec 2005 Location: Houston, TX Posts: 51	Makin' too many volts????? What could be causing me to make too many volts? At ilde I'm fine, around 12 volts, but at speed it pegs the volt meter out. The voltage regulator is just a few months old and my "GENERATOR" light does not come on like it did when the old reg had gone out before. Its too many volts for the radio too, it will only come on when the RPMs go back down and the volt meter reads 12v. HELP!!!! JD

03-06-2007, 01:34 PM	#2
bobthecop Senior Member Join Date: Nov 2006 Location: Yukon Oklahoma Posts: 2,647	Re: Makin' too many volts????? It should run around 14 volts any more and the regulator is not working __________________ Happiness is towing your "new" truck home. 1972 C-10 1982 GMC (parts truck??) 1969 c10 parts truck 1969 C-10 ( my sons) 1992 Silverado 4X4 (now the boys truck)(now mine again) 2002 Tarus (my wife loves that car) Last edited by bobthecop; 03-06-2007 at 01:34 PM.

03-06-2007, 01:46 PM	#3
jdhcth Registered User Join Date: Dec 2005 Location: Houston, TX Posts: 51	Re: Makin' too many volts????? Yea, but what's makin' my regs go out so often? The Alternator is new, well a new rebuilt, and this regulator was a high-dollar Borg Warner, previous one was a cheapy. Maybe I'm overlaoding the 60Amp alternator? All I've added was the stereo and it ran great for 2-3 months. Before that I didn't even have a stereo and it still seemed to kill regulators. JD

03-06-2007, 01:51 PM	#4
67ChevyRedneck Hittin E-Z Street on Mud Tires Join Date: Nov 2004 Location: Greenville, SC Posts: 23,090	Re: Makin' too many volts????? My truck would overcharge and undercharge randomly. It would jump to 18V while running, and then fall to 10V. It was retarded. After cleaning wires, having the alternator checked, and swapping out 3 voltage regulators I finally converted to an internally regulated alt. out of a mid 80's silverado. I think they at 90 amp alts. No more voltage regulator. Click the linky to see more http://67-72chevytrucks.com/vboard/s...d.php?t=230011 __________________ 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! Last edited by 67ChevyRedneck; 03-06-2007 at 01:51 PM.

03-06-2007, 04:31 PM	#5
Fred T Cantankerous Geezer Join Date: Aug 2002 Location: Bel Aire, KS Posts: 6,264	Re: Makin' too many volts????? Are your alternator and regulator the same amp rating? __________________ Fred There is no such thing as too much cam...just not enough engine.

03-06-2007, 04:45 PM	#6
724x4a/cchevy Self-proclaimed LED man Join Date: Nov 2003 Location: Harrisburg, Missouri Posts: 1,021	Re: Makin' too many volts????? im kinda in the same boat as you. "Project Bluebird" jumps really hard continuously from 12 to 14 volts. Makes the lights flicker when at idle. __________________ My LED Website My Photobucket Album of LED's Ask me about hand-made custom L.E.D brake and reverse lights. <- LINK I also do LED: -Third Brake/Cargo -Brake (truck and burb) -Reverse (truck and burb) -67-68 Front Turn Signals -69-70 Front Turn Signals -71-72 Front Turn Signals -GMC Front Turn Signals I can also do custom lights for other vehicles....i did a set for a AMC Gremlin once Norwood Survivor Last edited by 724x4a/cchevy; 03-06-2007 at 04:45 PM.

03-06-2007, 04:46 PM	#7
As2rd Registered User Join Date: Feb 2007 Location: Lexington Park, MD Posts: 47	Re: Makin' too many volts????? I am also suffering from this problem. The volt gauge is reading 13.5 when the engine is running and 13v when its off. My 5amp fuse keeps on blowing out when i hook up the memory wire to the battery . Any suggestions?---Andy __________________ 1972 Chevy Truck 350ci/th350 Auto. Daily Driver

03-06-2007, 04:54 PM	#8
76bonanza Senior Member Join Date: Mar 2003 Location: St robert Mo Posts: 2,001	Re: Makin' too many volts????? As stated before you should have around 14.5 volts with the alt running. that is normal any more than 14.5 and you have problems. __________________ 1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO

03-06-2007, 07:36 PM	#9
As2rd Registered User Join Date: Feb 2007 Location: Lexington Park, MD Posts: 47	Re: Makin' too many volts????? does anyone else know why my radio's memory fuse keeps blowing out? Its a custom autosound and i just got it back from tech support which they replaced a crystallized wire. Im thinking about adding a 2ohm resistor but that will take away voltage, Will it still be ok to do? or is there another way? ---Andy (sorry bout the thread jack ) __________________ 1972 Chevy Truck 350ci/th350 Auto. Daily Driver

03-06-2007, 07:45 PM	#10
jdhcth Registered User Join Date: Dec 2005 Location: Houston, TX Posts: 51	Re: Makin' too many volts????? OK. I got home and unplugged the Reg and plug an old one in, that DOES make my Generator light come on because it doesn't make enough voltage. I stayed around 12-13 volts like it's supposed to regardless of the RPMs. So the problem IS my new, expensive voltage regulator. Plugged it back in knowing I need a new one tomorrow. Well, as electrical system go, as I plugged it back in I have normal voltage. Like nothing was ever wrong. Maybe it needed to reset itself, who knows? On the subject of a new style one wire 90-100 AMP Alternator, what make them so special? I mean it still has a voltage regulator, just internal. These don't go out as often????WHY? Thanks all, JD

03-06-2007, 08:21 PM	#11
msgross Registered User Join Date: Jul 2006 Location: Central PA Posts: 12,201	Re: Makin' too many volts????? one was designed in the 60's and the other in the 80's maybe? i'm switching as well... __________________ The Garage: 1968 K-10 SWB - "Project Money Pit" 1996 Z-71 - "huntin rig" 1969 C-10 LWB (SOLD) "Project flip that truck or else" 1993 Passport, F@rd 1-ton (SOLD)"Project Cousin Eddie" My Garage Build "The 1,000 footer"

03-06-2007, 09:23 PM	#13
tracterman2 Registered User Join Date: Jan 2007 Location: Nashville, Arkansas Posts: 96	Re: Makin' too many volts????? just get rid of all of it and put on a one wire internally regulated alternator...you can pick them up for around 95 bucks or less and I think they are between 80 and 100 amps, so they'll take most anything...you may also check all your wiring under hood and dash...a short that only shorts from time to time will cause a load unload problem with regulators __________________ I'm Your Huckleberry. You Ain't No Daisy.



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