Yesterday, the cord for one of the front top markers disappeared inside the bus. Today, I cut a rather large access hole and installed an access panel. Some further work like that would get me access to the front flasher wires which I could switch from the control panel now that the flasher control is not present. I'm not sure what I'd do with them but it's a possibility.
Maybe by next week I might have a working door unlocker. I know I'll have to have another look at the rear light units. The brake lights are very dim. That sounds a case for new brake light units. I'm definitely getting closer to completion.