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Beanzy98's avatar
Beanzy98
Explorer
Aug 18, 2014

Fuel pump voltage?

Dropped my fuel tank to install new fuel pump in my 97 Bounder with Ford 460 engine. Before reinstalling the tank I checked the voltage at the pump pigtail. I had 6.67 volts. Anyone out there know what the voltage should be at the pump? I thought it was low but maybe not. I figured I'd ask before reinstalling the tank. Don't really want to drop it again if there's a problem
Class A
  • Heisenberg's avatar
    Heisenberg
    Explorer
    Aug 19, 2014
    The power to the pump is also the power to the strain gage which supplies the fuel level. While 6.67 seems like a good number for a fuel level I cannot see a supply voltage (looking at the diagram now) without an energized fuel pump relay and pump with a closed inertia switch.
  • YC_1's avatar
    YC_1
    Nomad
    Aug 19, 2014
    Ditto on the float level. On mine voltage did not go to the tank pump until the engine started on my 89 vehicle. Threw me a bit too.
  • MountainAir05's avatar
    MountainAir05
    Explorer II
    Aug 19, 2014
    how many wires. Sound like you got one for the float level. My book only shows 12v Battery, relay, then to pump, Can't give you a voltage other than 12v.

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