You mean the electric harness?

Did you do a motor swap? Is that why you cant find it?

In my case, A/C wasn't working. After sometime searching, I realized that somebody previously has changed the first and the second fan rellay positions. That made car computer to keep air conditioning out of service...

Glad you found the cause of the problem! Awesome!

Yes motor swap and o think cable is cut
I found a White cable but o cant get any woltage when ac on or off
https://cimg2.ibsrv.net/gimg/www.nor...bfc54c4b9c.jpg

I think its relay shortcircut and stop working

Changed relay positions?
 

Do you mean someone swapped the relays with each other or another relay? I was checking some other issues and may have swapped those two relays. Will that keep the AC from coming on? I am not getting power to my AC clutch but it works if powered directly.

A/C Compressor Relay
 

Working on 2010 R57 JCW, after taking dash apart to install new radio head, no A/C. Panel lights up, no output to compressor. Checked all fuses, have not heard relay click.

Checked white lead out of fuse box, no current. Applied 12V compressor engages.

Does anybody know which wire it is that trips the relay out of back of A/C control? This car has the automatic A/C

Trying to determine whether it is bad control or relay, or maybe i dislodged a wire.

Thanks for any possible help

Are you asking for a wiring diagram?

Electrical R56 - A/C Compressor Relay
 

I guess so, I have Bentley but can't make heads or tails of those pages.

only thing I can provide is a wiring diagram but ya need to send the VIN.

ElectricalR56-A/C Compressor Relay
 

Vin# WMWMS9C51ATK19831

attached x3