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Steven_Tolbert
January 10th, 2009, 14:06
Ok so my dads friend has an F150 with dual tanks and for some reason it won't switch to the rear tank. Has anyone had this happen or have information, weather it has to 2 pumps or something? Any help or input would be greatly appreciated. Thanks in advance.
philofab
January 10th, 2009, 14:11
Early trucks had 3 pumps. 1 on frame rail and one in each tank. Later trucks got rid of the frame rail pump. It's a simple setup, checkball valve on both pumps and which ever one gets voltage from the switch runs. Check the switch and the relays.
Steven_Tolbert
January 11th, 2009, 21:36
Ok cool, thank you will do.
5racer
January 11th, 2009, 23:29
never heard of two pumps but theres a switch over valve on frame rail with many hoses on it and a 6wire plug i would check that but i would check switch first
philofab
January 11th, 2009, 23:40
never heard of two pumps but theres a switch over valve on frame rail with many hoses on it and a 6wire plug i would check that but i would check switch first

Sounds like the old Chevy setup. My truck doesn't have that.