Show me a diagram of ford dual tank fuel system - Cars & Trucks (2024)

SOURCE: 1979 Chevy 3/4 ton Pick up, dual Fuel Tank, wiring

Get Chilton Manuals at your local autoparts store they will help you with this.

SOURCE: gas over flow on dual tank system

If they fill separately and have a switch to select tanks, then simply just use whichever tank you want to. If they are connected, you will have to drain both tanks, remove the connecting pipe and plug each tank. Make sure you are using the one that the pickup is in if there is only one.

SOURCE: Dual tanks on 1990 Ford F150

It should not cause no problems but instead of removing the tank leave it in the truck take out all the fuel in the tank and jus discontinue use of it. This will save you alot of time and trouble and i also suggest that if anyone besides you drives this vehicle then i would put a locking gas cap on it so it cant be accessed at anytime except by you.

SOURCE: 1987 ford f150 dual fuel tanks fuel qty gages

tank switch on dash could be bad, also selector valve could be bad. are the fuel gauges accurate front or rear. like you say the rear reads full, is it?? I would try the switch on the dash first.

SOURCE: 2002 Ford Expedition Eddie Bauer 5.4l Dual A/C

There is one orifice tube for the font air. It is located in the a/c line coming from the condenser to the evap. core. the rear a/c has and expansion valve attached to the rear evap. core. Hope this helps.

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The black reservoir/fuel tank selector unit you are referring to is the fuel tank switching valve, which is designed to switch between the two fuel tanks in your 1988 Ford Ranger XLT 4X4. This valve is responsible for directing fuel from the selected tank to the fuel pump and engine.
The second fuel tank selector unit you mentioned (part number 5sv2k) is likely a replacement part for the original fuel tank selector unit. It is not intended to replace the fuel tank switching valve.
The dual fuel tank system in your Ford Ranger requires both the fuel tank switching valve and the fuel tank selector unit to function properly. The fuel tank selector unit allows the driver to switch between the two fuel tanks, while the fuel tank switching valve directs fuel from the selected tank to the fuel pump and engine.
If the black fuel tank switching valve is leaking or malfunctioning, it should be replaced to ensure proper operation of your dual fuel tank system.

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Hello. That fuse is in one of two places; in the main fuse box on the driver side in the cab or on the left front inner fender. Good luck and keep me informed; if you want to.

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Here is the diagram.

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Sounds like the selonoid at the switching valve is not working.

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the tank switch on a ford truck also switches power from the pump in one tank to the other that is probably your biggest problem.

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there usually is a dual take valve switch under truck which could be the problem

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From what I can find out Ford did not use a fuel transfer valve in 1992. They ran both pumps to a common fuel line and used one way check valves to keep one pump from filling the other tank while keeping the entire fuel system pressurized. Your tank selector switch is actually switching pumps off and on, not a transfer valve. The problem Ford had was the one way valves failing causing one of the tanks to overflow. They have an external one way valve kit to solve this problem, but the valves are about $85.00 each.