battery I grabbed was backwards?

2000 FORD F-150
124,000 MILES • V8 • 4WD • AUTOMATIC
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MOOSEFBALL09
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  • 1 POST
I hooked a different battery up to my truck to start it while the origanal was charging and I didn't relize that thhe battery I grabbed was backwards. I accidently hooked the negative to the positive and the positive to the negative. Now the batteries won't hold a charge and we tested the altenator and it's good what could be wrong? thanks!
Dec 8, 2007 at 1:31 PM
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RASMATAZ
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Welcome to 2carpros

You short circuited the battey-might also want to have the alternator load tested to make sure its putting out and inspect the fusible links.
Dec 8, 2007 at 1:41 PM
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STRAILER
  • CAR REPAIR CONTRIBUTOR
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When you connect the batteries backward it can short the battery out internally and it will need to be replaced. Here is a guide to help you fix anything else that might be wrong.

https://www.2carpros.com/articles/resolving-reverse-battery-connection-in-cars-a-step-by-step-repair-guide

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Jul 20, 2024 at 6:54 PM