Batterys not holding a charge - Ford Powerstroke Diesel Forum
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post #1 of 7 Old 08-23-2013, 01:26 PM Thread Starter
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Batterys not holding a charge

Alright so about 2 weeks ago my truck wouldn't start checked the battery's and they were dead put them on a charger charged both of them up let it sit over night and then the next morning both of them were dead again took them to the ford dealership got two new battery's put them in. The truck ran good for two weeks and today it wouldn't start up the whole two weeks the battery light was on too. I talked to my girlfriends dad and he said I probably have a short or something wrong in the charging system. Let me hear yalls opinions on what you think it might be wrong. The truck is a 1999 F250 7.3L with 308k
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post #2 of 7 Old 08-23-2013, 01:52 PM
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What's the voltage at each battery with the truck running? Check it after a few minutes so the glow plugs have had a chance to shut off.

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post #3 of 7 Old 08-23-2013, 01:59 PM Thread Starter
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I cant even get the truck started. When you turn the key all you hear is a clicking noise for a few seconds then it stops.
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post #4 of 7 Old 08-23-2013, 02:05 PM
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Then charge the batteries first. Checking the voltage will give you a clue if the truck is charging correctly which is likely the issue with the battery light coming on.

Actually, just reread your first post. How long did you charge the batteries for before disconnecting the charger and letting the truck sit? You might consider pulling the alternator and getting it tested. It could have a issue preventing charging and causing a drain.

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post #5 of 7 Old 08-23-2013, 02:11 PM
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I think if the battery light is on while the truck is running that means your alternator isn't putting out the correct voltage. I would start there since you already got new batteries.



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post #6 of 7 Old 08-23-2013, 02:24 PM Thread Starter
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Probably a good 5-6 hours each I just charged them till the charger said 100%. Alright thanks ill pull the alternator off and get it tested.
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post #7 of 7 Old 08-23-2013, 06:35 PM
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if your batteries weren't taking a charge, your alternator could have went from putting out 13+V constantly.

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