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Battery problem

3362 Views 13 Replies 5 Participants Last post by  yan7gin
Hey guys, I have a 1988 f250 7.3 and my gear shifter broke off right above the transmission (zf5) so I welded it back. I removed both battery negative cables before I started. The next couple of mornings I went to start the truck and had low voltage. Like 5.3 volts on the cranking battery. So I had the alt checked and the stator came back as bad, luckily it was still under warranty so I replaced it. The next morning, same thing low voltage but this time it was .3 volts. I took the battery to Walmart to have it checked , it was less than a year old. After waiting 1hr and a half it came back good. So I get back home and check amp draw with everything off( even underhood light) and I had a 3.5 amp draw. I checked every in cab fuse one at a time with no change. I had to leave for work shortly after. As I return this weekend I bought a new voltage regulator from advance. Hooked it up and no fix, the amp draw is now dang near 5 amps. I'm needing help with this one guys. Oh and my battery light is on as well.
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Just as a FYI, unless your truck has been rewired you do not have a starter battery but both batteries are used for starting. They are wired in parallel which means that they are connected positive to positive and negative to negative.

Also while it really doesn't matter it is a good idea to replace both batteries at the same time.
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