I have an '88 e250 with dual tanks. Gauges and valve working fine until when I was driving today. I flipped the switch from the front to the rear tanks and the gauge went all the way empty (tank was 100% full) and the valve didn't switch. Flipped the switch back to the front tank and nothing. No gauge movement at all. I pulled the switch and checked it for continuity. It appears to be switching correctly and I have voltage to the switch. I pulled the plug at the selector valve and am not getting any voltage to it. I am going to get some smaller wire to insure I am making a connections with the contacts in the plug just to make sure I am reading accurately. Does anyone know which fuse is for the gauge/selector valve in the van? I see on listed on the F-Series fuse panel, but not in the E-Series. Is it located somewhere else? I am going to start pulling and testing fuses, but didn't know id anyone knew.

Do the valves just go completely dead all of a sudden? I find it weird that both the gauge and valves stopped immediately when I flipped the switch and now nothing is working on either tank.

 

So I got a small wire to make sure I had contact. I am getting 12 volts to the valve plug. It switches which wire it comes in on when I flip from the rear to the front tank. So does this mean my valve is bad? I didn't see one on Rock Auto and the AZ one isn't a direct replacement. I just find it weird that it was perfect, I flipped the switch and now it's dead...gauges and all. Any thoughts?

 

So from my reading it seems like my selector valve is probably sticking. There was also reference to dissembling it and cleaning it. Anyone had success with this?