Weird battery/electrical issue - Ford Powerstroke Diesel Forum
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Old 09-01-2013, 05:11 PM
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Weird battery/electrical issue

I installed my tow tune to tow boat to the beach Friday. I left programmer tuning while I went and showered after work. Came back out about 20 min later, programming was done , time to go. The truck turned over good but kinda fell off at the end before cranking like the battery was gonna die. Truck drove fine and the volts were up. We stopped one time on the way 2 min from the house to fill the boat up. Cranked fine then, cranked fine the next morning to go put boat in but would not even turn over to get boat out. Jumped it and went home about 5 min away. Cut it off and ate dinner, then it cranked fine to go get batteries checked. Test came back and said main was good, secondary to charge and test and alt had a 6v drain with everything off. So...came home...the next morning it cranked fine. Stopped by to top off boat, cut the truck off, it wouldn't crank. Jumped it, and took off cables while on the boat, and of course it cranked good. I haven't had time to look at anything but I'm hoping its just a bad battery. What y'all think?

Last edited by Onefast96svt; 09-02-2013 at 04:55 AM.
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Old 09-01-2013, 09:59 PM
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I would look for that 6vlt drain, you can have the best battery in the world and that will kill it every time eventually.
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Old 09-02-2013, 03:04 AM
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It's going to be fun trying to find it. I'm going go try pulling fuses and testing when I get home.
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Old 09-02-2013, 05:30 AM
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how do you test for battery drain?
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