Ya know, I didn't think about manually pushing that relay. I'll have to give that a shot.

Giving this some more thought, I see lots of crap will turn OFF the compressor, but WTF turns it on? Is it setup to go all the time unless one of the handful of things is wrong?
My thinking is it's GO signal is the KL (10) but it must have something to do with the little d or c. Little d is to temperature control unit (terminal 10)

Do you know if there is a way to verify any of that? I've got my control unit out of the car at the moment. I hate like hell dealing with 40year old german plastic, but I'll rip it apart if you think it's worth a peek...

I did buy another klima on fleabay, suppose to be NOS and was a hundred bucks, but knowing my luck, I'll install it and nothing will change. That's why I'm still in the fight at this point. lol