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Another no start post

1005 Views 8 Replies 8 Participants Last post by  RudyForman
I went to start the truck yesterday afternoon after work and went through the normal sequence of waiting for the start light to turn off and when I went to crank it, it tried turning over for a couple seconds then quit. A buddy tried to help me jump it, but no luck there. When it was hooked up to his truck, the battery meter would jump up to normal range then immediately drop back down to about 6V. If I put the key in and turn it to on when it is not hooked up to another vehicle, I can barely see the dash lights flickering but nothing else will happen. The dome lights are flashing on and off and I can hear the turn signal relay clicking on and off, but that's the only thing that it will do right now.

This morning I put it on a battery tender and it said the batteries were full. I also disconnected both batteries and put a voltmeter on them and it was reading 12V. Any thoughts on where to look next?
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I pulled the batteries and took them to autozone to have them tested. They were both in the 12.5V/830cca range. Before I put them back in I cleaned the post and cables with a wire brush. When I went to start the truck the lights all came on like normal and it did start but it wasn’t a “strong” start like I’m used to. It seemed to drag a little. Any other ideas? I’ll double check the rules to make sure it’s ok but I’ll see if I can record it later today and post it here.
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