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#1 |
Registered User
Join Date: Aug 2001
Location: College Station, Texas
Posts: 486
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My battery has been going dead after every time I drive my truck. The next time I go to start it, the engine wont roll over. I had both the battery and the altenator checked, both were good. The grounds are good, nad the cables are good and tight to the battery. What could be causing my battery to drain so quickly?
------------------ 1972 Chevrolet C/20 LWB, BB 402, Tach, Bedside Toolbox, Posi, Factory AC, Factory AM/FM
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1972 Chevrolet C/20 LWB, BB 402, Tach, Bedside Toolbox, Posi, Factory AC, Factory AM/FM, cruise, Dana 60 |
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#2 |
computer illiterate
Join Date: Jan 2001
Location: Des Moines, IA
Posts: 6,446
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if you had your battery checked and its good then its probably your voltage regulator going bad
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72 2wd blazer 72 swb 4x4 |
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#3 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Yup, they are cheap too.
------------------ '69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it. Need to pick up the one ton Longhorn with a PONTIAC 350/350soon. Thanks every one! ![]() Check out The Longhorn Webite. If you need a pic posted, E-mail me at longhornmail@yahoo.com Andy, in Columbus Ohio |
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#4 |
Weapons Of Construction
Join Date: Apr 2000
Location: Colorado, USA
Posts: 1,095
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Pull the + battery cable. Connect a 12V test light between the post and the cable. If it lights up, you have a drain somewhere. Start pulling fuses until you find it. Make sure doors are closed or you will be troubleshooting to the dome light.
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1971 GMC 2500, 402/TH400 4.10 Daily Driver Lafayette, CO |
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#5 |
Registered User
Join Date: Aug 2001
Location: College Station, Texas
Posts: 486
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I just did what 71gmc said, no drains, so That leaves the Voltage Regulator, correct??
------------------ 1972 Chevrolet C/20 LWB, BB 402, Tach, Bedside Toolbox, Posi, Factory AC, Factory AM/FM
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1972 Chevrolet C/20 LWB, BB 402, Tach, Bedside Toolbox, Posi, Factory AC, Factory AM/FM, cruise, Dana 60 |
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#6 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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hmmm, don't sound right to me...
Even if it was the regulater, if it is draining the battery, it would be putting a load, and it woulda showed up on the test light test. If you did the testing right, I think your battery is shot, or REAL bad connections somewhere. ------------------ '69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it. Need to pick up the one ton Longhorn with a PONTIAC 350/350soon. Thanks every one! ![]() Check out The Longhorn Webite. If you need a pic posted, E-mail me at longhornmail@yahoo.com Andy, in Columbus Ohio |
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#7 |
Fords Worst Nightmare
Join Date: Jan 2002
Location: odessa,tx
Posts: 206
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i had the same kinda problem, and we found out the altenator was bad and draining power, no problem we got a new but still no power, and comes to find out the dumb guys at the auto shop werent testing the battery right, so that was bad too, make sure there testing it right b4 u go buy new stuff.
------------------ My 69Chevy C/10 Yee Boo [This message has been edited by ChevyMonkey (edited March 15, 2002).]
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My 69Chevy C/10 Yee Boo |
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#8 |
Registered User
Join Date: Aug 2001
Location: College Station, Texas
Posts: 486
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I took the test light, grounded it to the negative post and touched the positive cable, did I do the test right???
I've had the battery charged and tested at three different parts stores, all showed that the battery was good. I also had the altenator checked, it to was good. I guess I'll pull the regualtor tommorw unless there is something else I can check? ------------------ 1972 Chevrolet C/20 LWB, BB 402, Tach, Bedside Toolbox, Posi, Factory AC, Factory AM/FM
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1972 Chevrolet C/20 LWB, BB 402, Tach, Bedside Toolbox, Posi, Factory AC, Factory AM/FM, cruise, Dana 60 |
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#9 |
Registered User
Join Date: Jan 2001
Location: Killingworth, CT. USA
Posts: 3,378
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Just to see if it's charging in the truck, connect a volt meter accross the bat posts and take a reading before and after you start the truck. If the bat is reasonably charged up to begin with, you should have readings something like 12.5V before you start and 14.V when it's running. If you don't have a volt meter handy you can touch the center back side of the alt while it's running with a steel item, such as a screw driver, and it should be magnitized while the truck is running, if it is charging ok.
------------------ 1971 C10 swb stepside 350/700R4/3.73posi Killingworth, Connecticut
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1971 C10 swb stepside 350/700R4/3.73posi (retired as of 4/22/03) 1998 S10 short bed 2002 S10 Blazer 1942 Oldsmobile 1958 Massey Harris Pony 1951 Wife Killingworth, Connecticut May those who love us, love us, any of those who do not love us, may God turn their hearts. And if God is unable to turn their hearts, may he turn their ankles so we may know them by their limping. A man who works with his hands is a laborer; a man who works with his hands and his brain is a craftsman; but a man who works with his hands and his brain and his heart is an artist. |
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#10 |
Guest
Posts: n/a
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disconnet + cable hook clamp of test lite
to the cable,put test lite on the batt + term if lite comes on you have a draw. this is when you start pulling fuses one at a time till lite goes out. take dome lite blub out so you can work with door open. ------------------ 72BLUE C10 SWB 86BLUE K10 LWB 87RED S10 SWB 89RED S10 SWB |
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#11 |
67-72 Addict!
Join Date: Feb 2002
Location: The TAX State!
Posts: 7,857
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I just went thru this 2 months ago. It turned out I had 3 problems. The digital clock connection was causing a slight draw constantly. The ground connection on top of passenger side core support needed to be sanded to bare metal. (This was causing my headlights to be dim). Lastly, my "brand new" battery had a dead cell in it. I paid $45 at an auto electric shop to find all this out. When I took my battery to Pep Boys for an even exchange, they tested it and it "passed" but they still gave me a new one. I haven't had a minutes trouble with it since. I hope this helps.
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Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads |
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#12 |
My other Love
Join Date: Aug 2001
Location: Castlegar B.C. Canada
Posts: 4,085
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Check the + wire on the starter
my truck had the same sympotms yesterday, id stop the truck and i couldnt start it up agian when it turned out that the bolt holding the wire on the starter had become very loose causing the battery to discharge and the truck not being able to start, luckily i was near a friends house and i fiexed it there ------------------
Hooter_5@hotmail.com AC/DC RULES!!! www.castlegar.com
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![]() Castlegar B.C.The great white North (Canada Eh!) Hooter_5@hotmail.com First generation Monte Carlo club pictures of my life |
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#13 |
Recovering Truck Driver
Join Date: Mar 2002
Location: Orleans, NE USA
Posts: 1,883
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I had that problem with my 72, only mine was the ground on the starter, a bunch of oil and dirt keeping it from grounding properly to the block. But if it is actually draining the battery, you might consider your anmmeter(if equipped). That happened on a Dodge(yuck) that my uncle once had. He spent a ton of money on the thing trying to fix it and it was the friggin' ammeter the whole time.
------------------ '72 Chevy 1/2T 4x4 shortbox stepside 350/350auto on '84 ralleys and 31/10.5s 67 Cutlass convertible 330, 3spd stick 90 GMC Jimmy 350/auto Chad Stephens Orleans,NE
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67 K-20 350, SM465, Eaton rear, 4.56 no spin option 00 Dodge 2500 4x4, 24V cummins, 5 speed Chad South Central Nebraska |
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#14 |
Registered User
Join Date: Feb 2001
Location: Nikiski, Alaska
Posts: 477
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I went through this same problem on my beater years ago. Still had a slight draw even with all of the fuses pulled. Turned out it was the antique starter solenoid itself was sucking a constant 1/4 amp.
Just my experience. ------------------ Just as if I knew what I was doin'
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Just as if I knew what I was doin' |
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#15 |
Account Suspended
Join Date: Jan 2000
Location: Woodstock, IL
Posts: 7,020
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I am by no means an artist!!!!
But I hope this little diagram can help you out. ![]() ------------------ http://hometown.aol.com/racedvl/racedvl69index.html Woodstock,IL.northwest of Chicago It's not what you buy, it's what you build!! I did not climb to the top of the food chain, to become a vegetarian. For some pics of my truck. |
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#16 |
Registered User
Join Date: Aug 2001
Location: rock island,il,usa
Posts: 5,382
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Damn.....I did mine backwards! I hooked between the neg cable & post.....it lit the light & i found the problem though....
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http://community.webshots.com/user/hotrodhorn |
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#17 |
Account Suspended
Join Date: Jan 2000
Location: Woodstock, IL
Posts: 7,020
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It will work either way.
------------------ http://hometown.aol.com/racedvl/racedvl69index.html Woodstock,IL.northwest of Chicago It's not what you buy, it's what you build!! I did not climb to the top of the food chain, to become a vegetarian. For some pics of my truck. |
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#18 |
Registered User
Join Date: Aug 2001
Location: College Station, Texas
Posts: 486
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Thanks for all the replies, still haven't been able to check it yet, I've been busy. I was doing the test wrong. SO I'll go and try it again. I'll let yall know the results when I finally find out whats wrong.
Thanks again... Garrett
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1972 Chevrolet C/20 LWB, BB 402, Tach, Bedside Toolbox, Posi, Factory AC, Factory AM/FM, cruise, Dana 60 |
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#19 |
Old member
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
Posts: 19,936
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I would get my old trusted volt meter out and put it on DC and crank the truck up at idle and then put red terminal to postive and black to negative and see if your charging the battery, it should red at least 12volts at idle, and some times 14 if your regulator and battery are in good shape. This will tell you that the regulator is working O.K. because it takes 12 volts to operate, and if your not see over 12 volts your not replensioning the battery while you are driving it.
------------------ Andy 71's Are for ever!!! or 67,68,69,70,72 http://geocities.com/chevy71tpi/main.html
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1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 ![]() Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs. |
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#20 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Anything under 12.7 and your not charging. It should charge anywhere from 13.5 to about 14.5 .
------------------ '69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it. Need to pick up the one ton Longhorn with a PONTIAC 350/350soon. Thanks every one! ![]() Check out The Longhorn Webite. If you need a pic posted, E-mail me at longhornmail@yahoo.com Andy, in Columbus Ohio |
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#21 |
Registered User
Join Date: Jan 2013
Location: New providence ia
Posts: 1,018
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Re: battery draining- cant figure out why
Posted via Mobile Device
They also make a bypass connector if u choose to get a new alternator with regulator built in Posted via Mobile Device |
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