Baked sorry I was busy the last few days. Do a search for "vacation pictures" or maybe someone will PM you with the page or two or three you need. I would assume the signal from the ECM is 0-10 VDC, but it could be 0-12. Either way you should be able to hook up a multi meter, drive around and see some voltage.
I would think the plug to the clutch packs would be at the rear of the trans somewhere.
Anyone done any work to their BD (it's a BD right?) and have any specifics here? There should be a way to test the signals before you have to crack it open.