Key wiring diagram for 78 chevy 1 ton van

[j007monkey]

Newbie here but I can't find the 73 through 80 key wiring.

Complete 73-87 Wiring Diagrams

http://forum.73-87chevytrucks.com/smforum/index.php?topic=11766.0

www.gmsquarebody.com

It goes off the pages of the last section in the list of pages. Does anyone know where the purple or how the purple s wore gets to the ignition?

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Here is my 1 ton dually lol. So a blue oil sensor wire goes up to the left part of the ignition wires on the firewall interconnect

 

[Matt69olds]

I’m at work, it’s entirely too loud to hear your video.

I assume you’re trying to figure out the crank circuit? The crank trigger comes out of the ignition switch as either a purple wire with yellow tracer, or a solid yellow wire. It then goes to the nuetral safety/clutch safety switch, and comes out solid purple and goes thru the firewall connector to the starter.