Voltage Regulator problem I think - The 1947 - Present Chevrolet & GMC Truck Message Board Network

case_bt · 07-02-2003, 11:19 AM

Is there away that a electrical system can put out to may volts?
I seem to be having a problem when my truck starts the starter make a high pick noise then it starts fine before I started it I checked the voltage on the battery anf it had 18.5 volts (which is way to high) on it and after I started it is was 19.4 what does this mean is my alternator shot or is it my voltage regulator It looks very old.

Common sense tells me it is the regulator because the system is still charging.

**CPNE** · 07-02-2003, 11:38 AM

Voltage regulator. You may want to disconnect the connector on your alternator until you replace the regulator. Too much juice to the battery may cause it to explode

barn9 · 07-02-2003, 01:35 PM

Sounds like a good opportunity to switch to an internally regulated alternator and do away with an archaic voltage regulator to me. You'll be glad you did if you change over.

Custom 68 · 07-02-2003, 02:57 PM

first I dont think you can have 18.5 volts on the battery if it is not running. I think you better check you volt meter before you go any further.
Dave

Longhorn Man · 07-02-2003, 05:19 PM

I have to agree with Custom68....you'd be blowing fuses and little lights at almost 20 volts.
However, if in fact you are getting that kind of power out of it all, I'd swap over to the intenral set up.

case_bt · 07-05-2003, 11:37 AM

it was a bad meter used my good one from work and it was normal I my starter must be on its last leg

jef5150 · 07-05-2003, 01:42 PM

"amperage",,,,,not volts..if your fuse blows w/20 volts going thru it,you"ve got some "F'd-up wiring....LONGHORN=just pokin fun at ya,i know you know your sh*t!!!!!!!

07-02-2003, 11:19 AM	#1
case_bt Registered User Join Date: Jan 2002 Location: willis tx Posts: 374	Voltage Regulator problem I think Is there away that a electrical system can put out to may volts? I seem to be having a problem when my truck starts the starter make a high pick noise then it starts fine before I started it I checked the voltage on the battery anf it had 18.5 volts (which is way to high) on it and after I started it is was 19.4 what does this mean is my alternator shot or is it my voltage regulator It looks very old. Common sense tells me it is the regulator because the system is still charging.

07-02-2003, 11:38 AM	#2
CPNE Resident Curmudgeon Join Date: Dec 1999 Location: NH Posts: 6,662	Voltage regulator. You may want to disconnect the connector on your alternator until you replace the regulator. Too much juice to the battery may cause it to explode __________________ Currently on or near the homestead: 67 Chevy SWB 2WD stepside 350/3 on tree (Pat's) 67 GMC SWB 2WD Fleet 402/auto (Brian's under construction) 67 Chevy 3/4 ton 2WD 402/auto (Business Hauler) 67 Chevy 1 ton dually 2WD 396/4 speed (Former business hauler, Needs TLC) 68 Chevy 1/2 ton Suburban 2WD 250 six/3 on tree (Brian's Needs TLC) 70 Chevy 3/4 ton 4WD 350/4 speed (Pat's - Disguised as a 68 GMC) 71 Chevy SWB stepside (Crushed by tree - parts donor) 72 Chevy 3/4 ton 4WD (Parts donor) 72 Chevy 3/4 ton 4WD Suburban (Parts Donor) 72 GMC 3/4 ton 4WD 292 six/4 speed (Mine - Disguised as a 67 GMC) 81 GMC 4WD Dually Dump Body 350/4 speed (Business Hauler) 82 Camaro Z/28 355/Super T-10 (Pat's toy) 93 Caprice 9C1 (Brian's Cop Car) 02 Toyota Camry (Reliable but a souless steel and plastic hulk) 2011 2SS RS Camaro M6 Factory Hurst Shifter Maybe I need to sell some of this crap Yet another Bozo with a sawz-all

07-02-2003, 01:35 PM	#3
barn9 Half a bubble off! Join Date: Jun 2000 Location: Winfield, Ks, USA Posts: 5,588	Sounds like a good opportunity to switch to an internally regulated alternator and do away with an archaic voltage regulator to me. You'll be glad you did if you change over. __________________ Just call me LB. '71 Cheyenne, 402BB, hauls blondes, brunettes, or redheads.

07-02-2003, 02:57 PM	#4
Custom 68 Registered User Join Date: Nov 2001 Location: Springfield, MO Posts: 2,943	first I dont think you can have 18.5 volts on the battery if it is not running. I think you better check you volt meter before you go any further. Dave __________________ Dave 1968 Custom Chevy with turbo charged 5.3 gen III 4l80e swap 1967-71 GMC 3/4 ton long step 4x4 (not sure what year exactly?) "A good friend will bail you out of jail...but a true friend will be sitting next to you saying "that was frekin awesome". "If it doesn't fit force it...If it breaks then it needed to be replaced anyway!"

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07-02-2003, 05:19 PM	#5
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	I have to agree with Custom68....you'd be blowing fuses and little lights at almost 20 volts. However, if in fact you are getting that kind of power out of it all, I'd swap over to the intenral set up.

07-05-2003, 11:37 AM	#6
case_bt Registered User Join Date: Jan 2002 Location: willis tx Posts: 374	it was a bad meter used my good one from work and it was normal I my starter must be on its last leg

07-05-2003, 01:42 PM	#7
jef5150 Inline 69 Join Date: Apr 2003 Location: valleysprings,california Posts: 1,018	"amperage",,,,,not volts..if your fuse blows w/20 volts going thru it,you"ve got some "F'd-up wiring....LONGHORN=just pokin fun at ya,i know you know your sh*t!!!!!!!



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