Low Battery Warning. Entire dash shuts off and on while I'm driving.

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01-19-2019, 06:51 AM

manuel navarro

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Low Battery Warning. Entire dash shuts off and on while I'm driving.

I get a low battery warning while I'm driving. Took it to Autozone to check the battery. Battery is fine. They also checked the starter and the alternator. Everything mechanically is fine. Wanted to know if anyone has experienced the same problems. 2010 F150 XLT 2WD.

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01-19-2019, 07:46 AM

steve(ill)

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YEP........... alternator is dieing... When the light is on, its NOT working... Sometimes it does.

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01-19-2019, 07:46 AM

seville009

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What were the battery voltage numbers? How old is your battery? I would test it myself first (running and not running) to make sure before overthinking it, as a low battery may be the only issue.

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01-19-2019, 08:32 AM

steve(ill)

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when the truck is RUNNING, the alternator is running the show.. IF the light comes ON, the battery voltage is above the alternator voltage.......... alternator bad, or wires corroded / bad ground.

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01-19-2019, 01:24 PM

brokenleg

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Or the fusable link is burned up...

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01-23-2019, 10:11 AM

ubereal2

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I'm betting on the battery. I just changed mine on my 2013, and the same on my 2011 that we had, same issue on both.
The kids at Autozone and Oreilly's are looking at voltage in the batteries, and not doing a load test on them, or checking for amperage in the charging system.

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03-01-2019, 01:36 PM

Wombat92

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Check your ground connections too. Also, I was getting an intermittent low battery warning on my 2013 while driving. One morning it would turn over but not start. I could not hear the fuel pump so I checked that fuse. It was not only blown but burnt. I put a new 20 amp fuse in and cleaned all of the electrical connections to the fuse block, battery, and a few ground connections. So far (about 8 months now), it is still fine.

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