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2000 Ford F-150 Battery is being drained while driving

Tiny
RUFUS64SCS
  • MEMBER
  • 2000 FORD F-150
  • V8
  • 2WD
  • AUTOMATIC
  • 165,000 MILES
While I am driving down the road after about 45 minutes or so of driving my voltage meter starts to drop to nothing and then the truck dies. I have had the alternator and the battery tested and they are both good and I replaced the starter relay switch and it is still happening. What could be causing this?
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Sunday, November 29th, 2009 AT 2:20 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
WHen you start the truck, is the voltage gauge showing a normal reading? If so, when it starts to drop, you can remove one fuse at a time to see if one of them allows the gauge to return to normal. If one does, then you will have located the circuit that is the problem. Try this and let me know what you find.
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Friday, December 4th, 2009 AT 8:06 AM

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