Weird light problem

[JanDebL at aol.com]

My 91 2C has developed a weird headlight problem.  All of the symptoms are 
intermittent.  When the lights are turned on, sometimes only in the parking 
lite position, the dashlites dim, the speedometer registers 19 mph slow, the 
left & right turn signal indicators light up brightly and sometimes the turn 
signal indicators and the headlights will flash like the emergency flashers.  
I suspect a bad ground but the intermittent condition doesn't help the 
diagnositc procedure.  Any BTDTs are appreciated.
TIA, Jan Lahtonen   
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