My 2011 f150 5 0 has a battery light that turns on after about 30 seconds of running went to autozone and they check the charging system.
2012 ford f150 battery light comes on.
When engine is off the volts drop to about 12.
It had battery corrosion on the positive side of the battery and on the battery cable end.
My mechanic says that the alternator must be charging but why is the light on.
When you first turn on your car with the engine off the battery light will illuminate and this is normal.
The light was still comes on then they told me my alternator was bad because it was only charging at 13 5v they were not able to find an alternator for it.
The battery light is on but the voltmeter says 13 5 to 14 5 volts depending on the engine revs.
Maintenance repair the battery warning light comes on after about 30 seconds after i start my truck.
Asked by bob nov 03 2016 at 12 02 am about the 2008 ford f 150 xl supercrew sb.
Every thing was fine until today when the battery light came on.
They told me my battery was bad so i replaced it.
Turn off everything that draws power.
Assuming that the voltmeter is correct and reads 13 5v to 14 5v what.
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However the battery indicator light has come on just for a quick moment today and cleared when i accelerated.
I had the battery light come on my f 150 i have put a brand new battery in and all is fine.
If the battery light comes on while the engine is running and the vehicle is being driven this indicates a problem with the charging system.
React to the battery light.