Cab swap 2wd to a4x4 frame

[matt1228]

Hey guys I’m at a loss here I swapped cabs on my 86 k10 short box and don’t remember where this wire goes tanish wire with black stripe comes from bulk head under hood I’ve pulled the one off my old cab bc the new cab it is cut off idk if I did it???? Any help would be appreciated

 

[Turbo4whl]

Could be the tachometer trigger wire. Did either the new or old cab have a tach?

 

[83Stepper]

That bulkhead connector is all engine bay related accessories and components. That should be pink and black, color is faded. By the connector, looks like tach connector at the distributor cap.

 

[77Dmax]

Oil pressure is blue.