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GMDad · 03-20-2017, 07:45 AM

Your truck was 12V from the factory. How old is the battery? Might have a dead cell. I just went thru this 2 weeks ago on my 86 C10. Had worked great all winter for the little bit of use it got. I jumped it drove for 20 mins and was completely flat. Tried charging but no use. New battery in and no problems last 2 weeks. Just a lighter wallet... lol
If you take your multimeter and turn it to 20 volts and put the leads on the battery terminals (red on positive and black on negative) with the truck running the meter should read 14.5V or fairly close. With truck not running it will read about 12.3V if the battery is any good.

03-20-2017, 07:45 AM	#4
GMDad Registered User Join Date: Aug 2008 Location: Caledonia Ont Posts: 137	Re: Help! '61 C10 battery won't hold charge Your truck was 12V from the factory. How old is the battery? Might have a dead cell. I just went thru this 2 weeks ago on my 86 C10. Had worked great all winter for the little bit of use it got. I jumped it drove for 20 mins and was completely flat. Tried charging but no use. New battery in and no problems last 2 weeks. Just a lighter wallet... lol If you take your multimeter and turn it to 20 volts and put the leads on the battery terminals (red on positive and black on negative) with the truck running the meter should read 14.5V or fairly close. With truck not running it will read about 12.3V if the battery is any good. Last edited by GMDad; 03-20-2017 at 07:56 AM.