wiring diagrams

[fordman]

does anyone have a wiring diagram for 73-79's . i'm interested in how the fuel switch works in these trucks and how i could adapt the switch to work if my truck had two working tanks.

[460 crew]

I have a 79 F100-f350 electrical and vacume troubleshooting manual. I'll see if a pic of it will show up or I can make a copy of it in the next couple days. Gotta see if I can find what your lookin for.

[68F250]

What year switch ya got?

The '73 - '74 switch works just like our year trucks, it only switches between the two tank senders. You still had to manually turn the tank selector valve.

The '75 - '79 switch shows extra contacts so it can switch between the two tank senders and also switch the tank solenoid valve.

I'm just going by the wiring diagrams, it could be the same switch.

The switch used in our year trucks has extra contacts too so it could do the same thing if you removed the manual valve and wired in a solenoid valve.

[fordman]

78 the only switch i have in my truck is a seat switch. i'd like to at least be able to read a sending unit in both tanks.

[460 crew]

I belive we did what Barry suggested:The switch used in our year trucks has extra contacts too so it could do the same thing if you removed the manual valve and wired in a solenoid valve.

We put an electrical valve in my buddys 73 and it was run off the switch on the dash. next to the heater controls.

I took pics of the wiring diagrams but they don't really show up to good so let me know it You want me to make copies because I dont have a scanner.