New to the site, and needing help.

[dvdswan]

Do I wire the green wire to the starter solenoid?

NO! This is a single wire solenoid. i.e. the switching valve that is mounted to the frame. Looks like this...

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[78C10BigTen]

Always good to see another 78, mine is a 78 long bed c10 with a 350 so I'm partial to the year lol. Good look with the wiring, I know the guys and gals here will help you out.

Im a 78 guy here too! Mine is the same as yours except im a big ten model in silverado trim.

 

[78C10BigTen]

NO! This is a single wire solenoid. i.e. the switching valve that is mounted to the frame. Looks like this...

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Thats basically what my 78 switch valve looks like lol

 

[drcskinny]

NO! This is a single wire solenoid. i.e. the switching valve that is mounted to the frame. Looks like this...

You must be registered for see images attach

Ok, I'm not seeing that anywhere

 

[1973c10]

 

[86 SCOTTSDALE]

 

[Stewartutize]

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[DoubleDingo]

Here's the wiring manual for 78s. Go to the dual tank option, very simple wiring... IIRC, the switch is a double pole single throw, on/on.

https://www.gmsquarebody.com/threads/1973-1991-wiring-manuals.14498/

When I rewired my truck I was constantly going back and forth from the wiring kit to the wiring manuals to make sure everything went to where it was supposed to. Luckily we have them here as @dvdswan posted up.

 

[DoubleDingo]

Oh yeah, Welcome to Site!

 

[78C10BigTen]

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Looks like a mod needs to step in....

 

[Madhorn]

Welcome from LA (Lower Arkansas). I used the American Autowire harness in my 77, was easy to install and works great. Unfortunately I can't help you with the switching valve wiring, I am using a single tank. I am sure someone here will have what you are looking for.