Strange electrical issues
My left headlight is dimmer than the right normally. When I go to high beams, the left headlight goes out completely and the right one works properly. those are my only symptoms. I had a little corrosion on the harness but certainly not to the 'brown snot' level you had. Cleaning it did nothing. I think the voltage out of the chassis harness is too low, so I'm looking for a schematic.
did you find a fix yet? I'm still searching...
Joe
Dim lights and slow motors indicate low voltage and not enough amps. I agree the "brown snot" is a likely cause of the problem ... but I have no idea of where it could have come from. The only thing around the headlight motor that has any liquid is the radiator. Is this "brown snot" possibly coolant from the radiator? Seems like any coolant leak would have gone backward rather than toward the front of the car.
You may have a potential fire hazard with all the different electrical problems. I would do what could as quickly as possible.
Sorry I can't be more help.

