1992 Ford F-150 Testing a fuel float sensor

SHADETREE64TH

MEMBER
1992 FORD F-150

Electrical problem
1992 Ford F150 6 cyl Two Wheel Drive Manual 180K miles

Is it possible to test a fuel float sensor for this vehicle. The sensor is mounted to the fuel pump which is inside the gas tank. This truck has two fuel tanks. The fuel gauge works when switched to the rear tank but not when on the front tank. I have not removed the fuel pump/sensor from the front tank yet. I did find a sensor at a salvage yard but do not know if it works. It screws on to the fuel pump and has a single wire that goes to the wiring harness mounted to the tank. Ford wants $155.00 for a new one. If the one I found works I would like to use it. I don't know how or if it can be tested, not being hooked up to the fuel pump. Thank you.

Don Harris

2 Replies

JDL

MECHANIC
16,098 POSTS

On some makes and models, I have done an ohms test on the sending unit. Digital multimeter on the ohms setting, leads hooked to proper terminals, work the float up and down, the readings should change. My memory is old, I can't remember doing that on your particular vehicle, I have done it though.

I just wanted to add, you can check the sending unit already installed, the same way. If it reacts ok, I think the problem is elsewhere.