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Fuel gauge

Tiny
POOJER
  • MEMBER
  • 1989 FORD F-150
  • 4.9L
  • 6 CYL
  • 2WD
  • MANUAL
  • 56,000 MILES
Fuel guage is on full. Dual tank selector switch not working. When I connect a test light to guage wire it and the selector switch works. When I take test light off it stops working. The guage wire reads 7 volts. Is it supposed to have power?
Saturday, September 18th, 2021 AT 3:48 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,179 POSTS
Hi,

I need to get a better understanding of which wires are causing it to work.

Take a look at the attached pic. It is the wiring schematic for this vehicle. Can you identify which you are referring to?

Let me know.

Joe
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Saturday, September 18th, 2021 AT 9:06 PM

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