Thank you Gumpy! I copied your website and the system works perfectly. I scavenged 2 relays and bases from a bus, so I was halfway there. Saved me a lot of dough! My MC 7 had a box in the drivers side rearmost panel that gave outside access to the original voltage regulator. When I repaired the skin on that corner, I moved that box inside the engine bay. Since my 50DN alternator went bad, I pulled out the regulator and used it for the tail light panel.
I also fixed the rear emergency stop switch (that system now works!), found the wires for the backup lights, and the license plate lights. I need to find 2 lightbulb holders for the licene plate lights and a back-up light. I also fixed/added lights to the engine bay. Gotta love being able to see!
As a follow up question about the back-up light: I see reference to a switch on the tranny to run the back-up light. Anyone know where to look for it? I've never seen one. Thanks!