help identifying a plug
 

hey there, i kinda ran into a problem with disconnecting wire harnesses . i got a 84 c10 with a 305 engine and on the firewall right behind the EGR valve there is a lime green, with a dark green plug hanging. it is a two outlet plug. what i mean is it has a horizontal stem and a vertical stem in it. my speedometer dont work also so i was wondering if that has something to do with it. thanks in advance for the help.

Re: help identifying a plug
 

I can't think of anything, but then again 84 is 4 years newer than mine, and they might have changed some things around on it. I can't see it being a speedo plug, unless they went to an electric around that time.

Pictures do help too.

Re: help identifying a plug
 

the speedometer if im not mistaken is cable driven at least it is on the trucks ive had from 86 earlier... i dont know about the overdrive computer controlled trannys tho ill look on my 82 and see if i see any such plug