Similiar problem. Whilst trying to learn why my radio antenna doesn't extend, pulled radio out looking for obvious connector loose, haven't found it. BUT NOW...

When I lock the car, doors or trunk, lights flash as though the hazard switch was on. I assume this is an alarm. Didn't see any unconnected wire.

Immediate questions...
1) what does this radio wire look like? Color, connector? etc. I need clues.
2) what is the harm of removeing the alarm module...car won't start etc?
3) car doesn't have a dash antenna switch...can it be elsewhere?

1993 190e