1993 Ford F150 rear fuel tank not pumping fuel?

1993 Ford F150 rear fuel tank not pumping fuel? - 1

Bad/clogged fuel pump

Check whether the pump draws current.

Could be a bad fuel pump, bad selector switch, bad wiring, bad ground, , etc. Test for good power and ground at rear tank pump wiring… If those are good, then pump is bad. If no ground at orange wire from pump leading to black ground wire, then check ground wiring/connections for looseness, breaks, corrosion, etc. If no power at brown/white wire, then check back through the wiring from the pump to find the fault/break in wiring… Possibly a bad dash selector switch… Or loose/corroded wiring connections, frayed wires, etc… Many times, it's just a bad selector switch from wear but could be other issues.

http://www.justanswer.com/ford/6cc7a-93-f-150-fuel-pump-inop-needs-wiring-diagram-connector.html

Wiring diagrams…

Hi a fuel tank is just a space which hold fuel a pump is what pumps fuel out of the tank to the engine injection pump which pumps the fuel into the engine so two pumps. Chances are it is the more expensive one that needs to be replaced the high pressure injector pump.

Pump, lines, or wiring. Could be part of the selector if you have multiple tanks.

The switch is bad

There's many reasons the fuel pump in the rear tank of your F-150 isn't pumping fuel as you first have to use a sethscope to find out if the fuel pumps in both tanks do run as if you can hear the whine of the pumps they do work. The most common failures of the pumps are frayed wiring or a bad selector switch. In most cases to get at the fuel pump wiring the bed has to come off as there's multiple ways such as enlisting several buddies to come over to help you lift the bed off or if you have an engine hoist or gantry crane a bed lifting device would come in handy.