Random Plug Help

[alexsimpson440]

I was looking in my engine bay and I found a random plug that was not plugged in. I took some pictures. I also found a 1g active wiring diagram that I will post. From that diagram I believe it is AT related, I dont know what that means, or b16 ac clutch. But I do think it is more AT related. In the pictures, red it the exact wire and green is where it is leading to. http://tech.mirage-performance.com/1GDSMharness/1G-DSM-4g63EngineHarness.html That is the link to the diagram. You can click on each plug and it will bring you to more pictures. I just want to know what the plug is, and if it should be plugged in. What is its purpose.

 

[1990TSIAWDTALON]

Do you have A/C? That could be the compressor plug.

 

[tomica93]

maybe a knock sensor that is located on your block at the back side

 

[1990TSIAWDTALON]

That would have been my next guess also...and important!!!

 

[19Eclipse90]

The 1990 Engine Control Wiring Harness

It is for the A/C compressor.

 

[1990TSIAWDTALON]

Thanks Brian!

 

[alexsimpson440]

I do have AC. I tryed looking for a place to plug it in and i cannot seem to find anywhere. Maybe i didnt look hard enough.

 

[1990TSIAWDTALON]

The PO of my car had deleted mine and my cruise but luckly left every connector alone. I was pretty sure I had seen that plug on mine too, but I don't know the exact location for it to plug in but should be on the side or back of the compressor.

 

[alexsimpson440]

Well my AC seems to work fine and it isnt plugged in. Would that matter?

 

[19Eclipse90]

It is used to help the ECU maintain idle when the A/C is being used.

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