Need wiring diagram for accessory position on ignition key switch

[73c20jim]

I need to know what circuits are activated when the key is turned to accessory position. Are all the contacts for accessory inside the ignition switch?

GM wire code numbers and/or wire colors will be greatly appreciated.

I believe the colors and usage are:

Plug 1 (my number) 5 contacts

Pink >>>>>>>>>>>>> coil
Purple-white >>>>>>>> starter
Red >>>>>>>>>>>>> always 12V +
Brown >>>>>>>>>>> windshield washer
one slot empty

Plug 2 (again my number) 4 contacts

Black-tan >>>>>>>>>> brake warning light / brake warning light switch
Dark green >>>>>>>>> temperature switch / gauge panel
Orange >>>>>>>>>>> Connected to brown / heater switch
Brown >>>>>>>>>>>> connected to orange / alternator
Red >>>>>>>>>>> >> always 12V +

Any help is appreciated

Thanks

 

[DanMcG]

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

 

[73c20jim]

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

Studied this in detail. It doesn't show the accessory position wiring.

 

[Matt69olds]

Looks like the wipers and radio are on the brown accessory wire.

 

[C10MixMaster]

You must be registered for see images attach

i believe this same switch was used on most of our trucks. hope it helps. looks like pin 4 is all acc.

 

[DanMcG]

I think this might help, but I guess I'm not exactly sure what you're looking for.

You must be registered for see images attach

 

[73c20jim]

I think this might help, but I guess I'm not exactly sure what you're looking for.

You must be registered for see images attach

That's exactly what I needed.

Thanks.

 

[73c20jim]

You must be registered for see images attach

i believe this same switch was used on most of our trucks. hope it helps. looks like pin 4 is all acc.

Thanks

 

[73c20jim]

Looks like the wipers and radio are on the brown accessory wire.

Thanks

 

[73c20jim]

You guys are the best.

 

[73c20jim]

Got my **** figured out. Have intellitronix gauges and instructions say to put key in ACC to setup gauges. Turn to IGN to get out of setup.

Problem is the is NO ACC wire on the gauges. Ergo no power. Turn to ACC and gauges are dead.

Gotta call these guys again and have them explain how this works.

ACC powers wipers and radio and whatever else you hook to the circuit.