75 F250, 460, camper special, 2WD.

Problem:
Tank selector switch is set to the front tank which is almost full of fuel. The rear tank is empty. When I switch to the front tak, there is a click noise that comes from the tank selector valve. The truck does not start - it continues to turn over as if it were out of gas. The selector valve would not normally make any noise when changing tanks, which makes me think it is going/gone bad.

Temporary solution:
I connected the fuel line directly from the front tank to the fuel pump and bypassed the selector valve. Truck runs great and I can still use the selector switch to see how much fuel is in each tank.

Question: How would I go about testing the valve to be sure it is actually the valve that is bad and not something in the switch? The fuel selector valve has one wire - I have not followed it to find out where it leads to. I picked up a new universal selector valve from Napa - but I would rather confirm that the other one is toast before I install this one.

Thanks.

 

D5TZ-9189-B (replaced D5TZ-9189-A & D8TZ-9189-A) .. Fuel Tank Selector Valve & Solenoid Assy-mounts on frame rail / Obsolete

Marked: D5TB-9F271-AA or D8TB-9F271-AA or D9TB-9F271-AA // Last MSRP: $118.35 / Dealer net cost: $71.01 // SIX available NOS from three sources:

PARTS INTERNATIONAL in Farmers Branch TX has TWO = 888-727-0418.

KINSEL L/M in Beaumont TX has TWO = 800-816-2894.

HIGH BUCK!! BOB ALLEN FORD in Overland Park KS has TWO = 800-676-0675. Call this source only as a last resort, cuz this 'snake' wants mega-bucks for obsolete parts!

D5TZ-9A050-A .. Fuel Tank & Fuel Gauge Selector Switch, mounts into heater control panel / Available from Ford.

MSRP: $35.67 // FTE sponsor PARTSGUYED.COM price: $19.26.

Selector valve applications: 1975/79 F100/350 & Econoline with dual fuel tanks / Switch applications: 1975/79 F100/350 only.

Note: The switch is used to change the tanks and the dash fuel gauge.
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1973/74 F100/350's used a manually controlled brass selector valve that mounts on the floor adjacent to the drivers side of the seat.

The heater control panel mounted switch (D3TZ-9A050-A) only changes the fuel gauge from one tank to the other.

 

Thank you for the part numbers. Since I disconnected the fuel line from the fuel selector valve, I was able to locate it. I am not sure how I would use this info to check and see if my existing valve is bad or not.

 

Note: I edited my post adding much more info...