Engine bay wiring harness

dwlmll2682 · Oct 16, 2009

I just replaced the main engine harness on my 90 lx and noticed a couple of connectors on the drivers side near the battery tray that had nothing plugged into them. Anyone have a diagram showing what the connectors are for or where they go for the harness that comes through the firewall on the drivers side.........

Celeb · Oct 16, 2009

Can you take a picture of the connectors you're referring to? Is it the 2 connectors that come out under the wiper motor?

liljoe07 · Oct 16, 2009

Sounds like you have a mis-matched year EFI harness. But 302 LX Coupe's suggestion would really help anyone help you.

dwlmll2682 · Oct 16, 2009

302 LX Coupe said:
Can you take a picture of the connectors you're referring to? Is it the 2 connectors that come out under the wiper motor?

No, its not those connectors. It is more towards the front of the car below the ignition coil and starter relay.

dwlmll2682 · Oct 16, 2009

liljoe07 said:
Sounds like you have a mis-matched year EFI harness. But 302 LX Coupe's suggestion would really help anyone help you.

Ill try to get a picture of it and post it this weekend. Im thinking it might be the connector at the end of the O2 harness, but im not sure exactly where that harness runs

Celeb · Oct 16, 2009

I know there's normally a wad of wires under there but I don't recall an actual harness. Post the pics when you get a chance.

liljoe07 · Oct 16, 2009

Injector Harness

Connector 31 is on the driverside of the engine bay.
Connector 39 is not in the Engine Bay, its by the ECM( just a FYI)
Connector 40 is the O2 harness connector, its on the passenger side by the Mass Air sensor.

May or may not help.

liljoe07 · Oct 16, 2009

Cant get the Main ECM harness to act right. Here is another one.

dwlmll2682 · Oct 17, 2009

Cant seem to get the pics to load. Ill try again later. If it helps anyone the connector has two wires going to it. It is directly below the washer fluid resevoir mounted to the base of the strut tower. I dont think it connects to the main harness, it looks like it branches off of the harness that comes through the firewall on the drivers side

EDIT: pictures

Celeb · Oct 17, 2009

Bump for you, now that we got your pictures added.

apstang50 · Oct 18, 2009

I'll take a look at mine tomorrow and see if I have them.

Mustang5L5 · Oct 18, 2009

Pretty sure that one is the A/C clutch circuit.

apstang50 · Oct 19, 2009

Mustang5L5 said:
Pretty sure that one is the A/C clutch circuit.

Just looked at mine, that's what it goes to.

dwlmll2682 · Oct 19, 2009

The AC clutch connector comes off of the main harness, right? Cuz this one is coming off the harness that comes through the firewall on the drivers side, and it is mounted all the way at the bottom of the strut tower. I think that the circle i put on the picture made it a little confusing cuz it has that connector circled but it was more to show the general location of the connector, which is behind that mess of wires, hard to see from that angle. If it helps the connector has 2 wires running to it

apstang50 · Oct 19, 2009

When I checked mine the only connecter in that area that was round with two wires going to it was the one for the A/C clutch.

ID89GT · Oct 19, 2009

Wow your power steering bracket is like super clean. Mine is all dull

dwlmll2682 · Oct 20, 2009

apstang50 said:
When I checked mine the only connecter in that area that was round with two wires going to it was the one for the A/C clutch.

hmm, I guess Ill have to double check the connectors. Since I dont have A/C that connector would not be hooked up, right? Also, I thought that connector came off of the main harness that hooks up to the computer.........I tried to start it yesterday and the fuel pump is not getting power, so im gonna have to do some tracing to find out whats going on. I also have a couple of other connectors that I noticed were not plugged in, Ill have to take some new pictures, hopefully a little bit better than the last. Thanks for the help so far, I can see that this project is far from over.

dwlmll2682 · Oct 20, 2009

ID89GT said:
Wow your power steering bracket is like super clean. Mine is all dull

I had the enginge all apart so I cleaned up most of the parts and gave them some fresh paint to clean up the engine a lil, guess it worked.

Looking4Hammers · Apr 14, 2011

I know this thread is really old but does anyone know where I can get the connector from the main harness to the ac clutch?

My local scrap yards don't have any and it seems everyone i know has removed the ac and thrown it out.

jrichker · Apr 15, 2011

Please post the wire colors with the solid color and stripe color. They help identify the circuit and its function. Do not depend on a photograph to do the job, since the camera and the device the photo is viewed on can alter the color presentation. Clean the wires with some solvent before trying to identify them.

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