BATTERY LIGHT ON BATTERY GETS DRAINED WHILE ...

  • Tiny
  • Anonymous
  • 1998 Ford F-150
  • 125 miles

Battery light on, battery gets drained while driving, reman alternator did not cure. What's next?

Sunday, January 6th, 2013 AT 6:04 PM

1 Reply

  • Tiny
  • caradiodoc
  • Expert
  • 25,621 posts

Check for a blown 15 amp fuse under the hood. If it's okay, measure the voltages on the wires and tell me the wire colors and the values you get. We already have one valuable clue when the battery light circuit is working. That's the "turn-on" circuit for the voltage regulator.

The voltage on the white wire has to be measured when the engine is running.

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Sunday, January 6th, 2013 AT 9:19 PM

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