I'm just finishing putting my truck back together after replacing the head gasket and I can't figure out where this harness goes. It is light blue and located under the intake plenum and taped to the unused green harness for auto trans trucks. I know it is used because the inside is clean. Every other harness is correctly located so any help would be very appreciated!

engine: 1985 22REC

 

Looks like an AC plug. Is your cold start injector plugged in?

 

It plugs in under your intake towards the front.

 

Thanks 85 that's exactly what it was! pluged it in and the truck fired right up.