Also, when the headlight is dim and the warning light is on I can put the
brights on and the
warning light goes away (I don't think this indicates anything, I think this
is what sis supposed to happen). Any thoughts?
High beam is not monitored, for a start.
I would look for a bad ground.
Loose grounds can cause all sorts of fun; on the 85 300D I had the
following symptoms:
RH blinker would not work with lights on and in reverse
-or- with lights on and foot on brake
RH Front blinker and dash blinker was illuminating very dimly under those
conditions, and somewhat noticably when