Thanks for the EPS file. I guess I'll need to cut out windows for the IR devices.

I do have the Becker keys but I think you can get to it by removing the AC control panel. Just pry off the surrounding bezel gently and then remove the upper two screws to extract the AC panel. If your hands are not to large you should be able to get the connectors off the back of the Becker.

Further study of the Porsche wiring diagram suggests that the big brown wire goes to a ground point very close to where I moved it, but I haven't been able to find the other end yet!

It sounds like the S/N is more than 40 db but I don't have a good way to measure it. I think that the current state is quite tolerable but I will await your results.

Lynn