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1986 Ford F-250 Second fuel tank not working

Tiny
WAYWRD
  • MEMBER
  • 1986 FORD F-250
  • V8
  • 2WD
  • AUTOMATIC
  • 177,600 MILES
We have a 1986 ford f250 3/4 ton pick-up. We purchased it about 3 years ago. Originally the second fuel tank worked fine. About a year ago it stop working. When you flip the relay switch the fuel gauge goes to empty (even though tank is full). We're not even sure where to start looking for the problem. My dh says possibly the floater? Any help will be appreciated.

Thanks
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Sunday, March 30th, 2008 AT 5:55 PM

3 Replies

Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
Does it pump fuel out of the second type, just it doesnt say if it has fuel in it?
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Sunday, March 30th, 2008 AT 6:03 PM
Tiny
WAYWRD
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I should have been more specific, sorry. The fuel gauge for the second tank goes to empty and will stop running, as though it were out of gas.
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Sunday, March 30th, 2008 AT 7:39 PM
Tiny
BLACKOP555
  • MECHANIC
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Check the fuel tank relay and the fuses. With the switch flipped check for voltage at the pump.
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Sunday, March 30th, 2008 AT 7:48 PM

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