We have my daughter's 97 LTD and are trying to get the bugs out for her. She's been living with these problems for a long time.
When she would turn on her headlamps, her radio control lights would blink on and off with a mind of their own. She later noticed that with the headlamps on, her O/D light would go out as well as the 4 WD indicator light. Searching here, talking to Ford and looking at the Wiring Diagram, it seemed like the headlamp switch or the multifunction switch might be the cause. So far, both of them have been replaced and the problem is still there.
Last night, I was telling my daughter about our progress on her car. She mentioned that a couple of years ago, before the radio control lights completely died, she could get them to come on by wiggling the dimmer switch sideways. Gradually, that "fix" no longer worked for her. I mentioned this to my husband. His EB is doing the same thing but still in the blinking stage. On his way home, he wiggled his dimmer switch and sure enough--his radio control lights, etc., would come on and off.
Anyway, we think we are onto something here with the dimmer switch if I can get him to take that area apart--again.