Been bothering me for awhile now, no idea what this is supposed to goto. looks like it has been out of use for awhile too by the corrosion inside the plug. Its right between the driver side valve cover and the wiper motor. Black and pink with black stripe. No current SES codes either. Anyone have a clue what this may be for?

 

intake air temp..or was that black tan...

 

That's probably the "extra" plug people are all the time asking about on here...

All it has in it, is ECM-fused 12V (pink w/black stripe) and ground (black).

Nobody seems to know what it's for. Personally, being a manufacturing engineer at least part of the time, I suspect it was used in production line testing. But I don't "know" that.

 

Looks like EGR solenoid connector.

 

it must be because my 87 has that same plug, I checked my pics and there's a short pigtail off the large main harness dead center on the firewall with those colors and I do not have any not used connectors. It must be soemthing there, either iat or egr solenoid. I forgot what color iat was but since it's pink/black that's indeed ecm fused power and the black would be an ecm grounded wire, only the egr sol. has that.

 

The EGR solenoid needs something other than ign and gnd to work; if you plugged those 2 electrical things into something, it would be powered 100% of the time that the ignition was turned on.

Furthermore, the EGR soleniod isn't behind the driver's side valve cover.

It's not the EGR solenoid.

Although it somewhat "looks" "like" that connector; it's a 2-pin Weatherpak. But it also "looks" "like" about a half-dozen other 2-pin Weatherpak connectors, as well.

Not the IAT: that doesn't get 12V and ground, and nothing else, either.

It doesn't go to anything at all. Comes up quite often on these boards, no one has ever found anything that it goes to.

 

IT looks like it's the plug coming off the main harness and aiming to the right, that one is black and pink/black (checked in other pics where I didn't have the loom around the wires), I am 100% positive I have all connectors hooked up to something except the stock EGR sol. I'll have to check on my car to see where it goes.

 

EGR solenoid connector will have one pink/black and one SOME OTHER COLOR BESIDES BLACK wire in it. Blue, if memory serves.

The one in question IS NOT for the EGR solenoid.

 

Yeah most def not the EGR solenoid connector. both that and my IAT are hooked up and functioning properly.

I'm willing to believe it was for assembly line testing or perhaps a sensor or solenoid that never got implemented.