What is this connector for?? AC related

[TunasTwins]

I'm trying to intercept the signal from my innivate LM-1 wideband via the AC pressure sensor. I'm not very familiar with AC so I have questions with pics.
is this the AC pressure sensor or the SWITCH? what is the plug next to this that is NOT connected?? What I'm going to do is send a 0-1volt or 0-5volt signal out of the wideband and connect it to the AC where I can log the voltage via EFI live. This will allow me to log the AFR via the laptop so I dont have to stare at the wideband. Here's the pic:

 

[dropmech]

I can't answer your question, but I'm curious as to why you're choosing that particular spot to tap in?

 

[TunasTwins]

Basically its that or the EGR which, to my knowledge, my car doesnt have. To get the EGR I would have to add wire and tap the main pcm harness which would be cleaner. So to answer your question, I just need a place to send an electrical signal and the EFI Live software will easily read the AC. My wideband will send out a signal say 0volts=10:1AFR or 1volt=20:1AFR. Read here: http://forum.efilive.com/showthread.php?t=20
The next step is taking another signal from the WB and sending it to the 02 connector so I can pull the 02 and put my WB sensor there in place of the narrow band (NB).

 

[OmarR]

Yes, the one connected is the A/C pressure switch.


The one that is not connected is used in the OEM dual battery setup. You connect it to a heavy duy relay (GM #12135194), and that in turn connects the dual batteries when the engine is running.

 

[TunasTwins]

Thanks.