The fuel tank selector valve regulates and permits fuel movement on front and rear tanks with the use of a selector switch. When one valve is switched on, it opens one fuel tank and closes the other and vice versa. This is applicable for your 1994 F-150, 1995 F-250, 1996 or 1997 F-150 vehicle. If you are experiencing fuel system problems such as electrical problem with solenoid valve, internal leak from the valves and external fuel leaks then you may have a problem with your fuel tank selector valve. The Reservoir Fuel Tank Selector Valve can easily be located under the driver side mounted on the frame rail. Compatible with the following vehicles: 1989-1997 F-150 1989-1997 F-250 1989-1997 F-350 Replaces part numbers: F1UZ-9B263-B, F1UZ9B263B This is a compatible replacement part manufactured by AA Ignition. This reservoir fuel tank selector valve is NOT a genuine OEM part. Vehicle makes and their associated vehicle models and part numbers are used in this listing only to identify the vehicles this ac compressor fits.