Mystery connector

[Gruffalo]

I have almost everything figured out in the engine bay, except this.

What’s it for and where does it go?




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[Ron]

There is only one Black/Blue stripe wire I know of...So, if that is a Black/Blue stripe and a Black/Light Green stripe (BLG) on one side of the plug, and a Black (B) on the other side, I'd guess it is for the Idle Speed Switch (or mixed- with the Vacuum Solenoid wiring if the single is Green, or, it's for the 1uF Capacitor -- Hard to tell in pic).

Image2.jpg

[Shep]

Post a pic straight-on too, looks like one of the old "church steeple" connectors, but I can't tell if the black wire with a blue stripe is sharing a spot with the other black wire or if that's adjacent to it.

Also, where in the engine bay are we, can we zoom out quite a bit for context? And another pic chasing it as far down the rabbit hole as you can. More pics = more clarity.

[Gruffalo]

Thanks so far guys!

It exits the wiring loom just upstream of the green wires that go in The Valley.

One black and one black/blue are joined in one side of the connector, the other is a single black.

I’ll post more pictures later.
M


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[Ron]

1uF Capacitor

[Gruffalo]

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[Ron]

??
In the 2nd pic, it looks like a single Black on one side and two striped wires (black/blue & black/Light Green?) on the other to me...

(I second the motion to post a straight on shot down into the plug ;-)

[Shep]

(black/blue & black/Light Green?)

That's a black/light blue on both, there's no green there. This is why I love my calibrated monitors.

For what it's worth, that same connector on my car if memory serves has been disconnected for quite some time, I could only tell where in the engine bay it was by the recall paint on your firewall, and then realizing I was looking at the engine cover stay in the background. Lots of blurry metal in these shots (can you zoom out some more for Ron though? The wires I think we can see fine, but we need to see the wires in the surrounding context). Given what happened to my car however, I'm not necessarily saying leaving that plug disconnected is a good thing. At all. I destroyed an engine from the inside out by flooding it with fuel on a constant basis, so I can tell you what my car did, but don't use me as a benchmark unless the word "n00b" is used to refer to me, seriously (I grounded on an ECU input because the wire was black and "obvious ground"....... nope!)

Can you zoom out on the new connector also? Show like a quarter of the engine bay if you can, I have a hunch on that one, but until I know where this harness is found in the engine bay, I don't want to misguide.

[Ron]

That's a black/light blue on both, there's no green there. This is why I love my calibrated monitors.
...
(can you zoom out some more for Ron though?

Wierd! GTX/1920x1080/16.7 million colors?
I wasn't sure at first so I pasted the lower wire next to the upper like this:
wire.jpg
Colors don't look the same.
BUT, when I look at them in the 2nd pic, post 7, they are plainly the same..

==============

Back to the mystery plug...
From the 1st pic in post 7, I'd say that plug hasn't been connected for a long time.
In the schematic I posted above:
The Vacuum Solenoid has a Green wire on one side and an unlabeled wire joining a black/blue wire at a connector* on the other side.
The connector has a red wire coming in from its the other side, which goes to a capacitor.
The other side of the capacitor is grounded -- Ground wires are black.
* The symbol is for a contact connector which does not have to show other connections for the plug it may be in...

So, I'm staying with the plug being for that 1uF capacitor.
(It's purpose is to reduce electrical noise from the micro switch.)

============

Jonathan, you are right about different colors...it's not the plug in the other thread's pic #2:
The automatic trans only (Kickdown) switch uses LGG wire (and the fuel enrichment (Full Throttle) switch uses LG wire.
They both activate at the same time and supply ground. So it shouldn't hurt if they are swapped. Not so for the Idle Speed Switch.)

The plug in post 7 has a P and a O wire. They are for Fuse 12 and CO Dwell.
Both do tie into the big engine diagnostic plug (if equipped...).

[Shep]

Wierd! GTX/1920x1080/16.7 million colors?

ColorMunki Display. USB calibration device, does a fantastic job getting it to display correctly was my point, and only a hundred bucks (not cheap, but for my line of work, sometimes critical -- also, blue next to blue, I promise, grab another monitor you'll see a difference).