Battery drain - The 1947 - Present Chevrolet & GMC Truck Message Board Network

zane2513 · 12-12-2010, 08:27 PM

Something is draining my battery I put a new battery in and two days later my battery is dead. What could be causing this? I don't have a radio. My wires are all a mess I need to rewire the entire truck. But is there some way to locate what is draining my battery? This just started this week never had a problem before some something changed.
Thanks for your help.

1/2Dozen · 12-12-2010, 08:45 PM

do you have a test light? If so you take the negative cable off and use the test light as a connector from the negative cable to negative battery post. If there is a draw the lamp will light up. To find the draw start unplugging fuses or disconnecting circuits til the light goes out.

Hope this helps

62gmc910 · 12-13-2010, 11:23 AM

The aforementioned testlight method works very well, BUT sometimes if the draw is thru a relay you need to have the test light connected before disconecting the ground to keep the relay in the loop. (If you have the stock alternator it is prolly a stuck contact in the regulator)

12-12-2010, 08:27 PM	#1
zane2513 Registered User Join Date: Oct 2008 Location: Sand Springs, Ok Posts: 39	Battery drain Something is draining my battery I put a new battery in and two days later my battery is dead. What could be causing this? I don't have a radio. My wires are all a mess I need to rewire the entire truck. But is there some way to locate what is draining my battery? This just started this week never had a problem before some something changed. Thanks for your help. __________________ just rockin out in Oklahoma oh and rebuilding my 66' stepside & 66' Chevy LWB in my own way!

12-12-2010, 08:45 PM	#2
1/2Dozen Registered User Join Date: Sep 2010 Location: Mason City, IA Posts: 237	Re: Battery drain do you have a test light? If so you take the negative cable off and use the test light as a connector from the negative cable to negative battery post. If there is a draw the lamp will light up. To find the draw start unplugging fuses or disconnecting circuits til the light goes out. Hope this helps __________________ 66 suburban 51 Merc 2 door coupe 38 Chevy Business Coupe (gf's) 76 Airstream Sovereign

12-13-2010, 11:23 AM	#3
62gmc910 Registered User Join Date: Nov 2009 Location: Cremona AB Canada Posts: 370	Re: Battery drain The aforementioned testlight method works very well, BUT sometimes if the draw is thru a relay you need to have the test light connected before disconecting the ground to keep the relay in the loop. (If you have the stock alternator it is prolly a stuck contact in the regulator) __________________ 62 GMC 910 short fleetside 454 super t10 14 bolt w/gov lock 70s c20 front discs (built in the 80s) 65 GMC 930 dualwheel 292 4spd all origonal 39k mi(my sons truck) 63 GMC 950 camperized school bus, (Gus the bus) 350 4speed 2 speed rear 64 GMC 950 "spare" bus 283? 4speed detroit locker 53 GMC 1ton dual wheel bus 78 GMC c25 short course off road race truck(son's truck) 355 th400 14 bolt (www.wheel2wheel.ca) 88 Peterbilt 379 longhood (hauls race truck)



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