Does anybody have any information on what wires do what on a factory electric tank switch and solenoid.

I'm thinking about taking the solenoid and dash switch off my 79 that's parted out, and putting them on my 76 highboy. It's got an aftermarket tank, and the floor around the existing valve needs replacing. Since I'm in the process of changing heater boxes in the cab, I figured I'd go ahead and do it now when I re-install the controls, giving it a more "factory" look

Since the 76 harness doesn't have the wiring I need, I'll be running loose wires. I can't seem to find any information about what wire does what, and which ones I need to hook up.


Thanks
-Jameson

 

This should help.

http://www.fordification.net/tech/im...aster_3of9.jpg

 

Does the 79 with the solenoid/switch still have the harness in it? If so great place to get the wiring.

 

This might be a little easier to see.

 

I've got the harness stashed away somewhere. I'd have to cut the loom open to get all the wires out. I'm pretty sure there is a mid line break somewhere.

I was wanting to get a feel for how the wiring is to see if it would be easier to run individuals instead of cannibalizing the stock 79 harness.

 

The electric tank solenoid defaults open to one tank so you need power to the switch (a dpdt, double pull double throw type switch) and then power out to the solenoid. The other half of the switch needs the two incoming lines from the tank fuel sending units and a single out going line from the switch to the fuel gauge.

If say its way easier to run new wires than take the old ones out of your 79. You should be able to use your existing fuel gauge wires.

 

I was planning on leaving the fuel tank sender wire hooked directly up to the gauge. The aux tank doesn't have a gauge, and is more of an "oh ****" tank.

So power to the switch, and power to the solenoid, then thr switch wires to toggle the solenoid to switch?

 

In that case you need power to the switch and power from the switch to the solenoid. There may be a ground from the solenoid to the frame or bolting it to the frame may be its ground.