Batteries are prone to losing charge when they get older. You could try disconnecting them from vehicle. With a multi meter check to see if they are holing at the same voltage. If not replace them. Batteries need around 12.5 volts to start a vehicle. I say anything lower than 12.2 is on its way out. If it starts to drop lower and lower with just the meter. Then they no good. And deisel engines need a big boost to get them going.
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Thursday, November 13th, 2008 AT 11:46 AM