Re: Fuel Switch
my 94 f-150 dosent have one. it uses check valves in the pumps (when one is pumping, the other tank is protected from overfill by the checkvalve in the pump not being used). the lines are simply connected with 2 "Y's" (pressure and return for both pumps together (parallel)) the pumps are switched electrically only. there are overfill problems to potentially haunt you w/ this system as the chkvalves fail and you start spilling gas.