I just bought my first 300D. I've helped a friend with his converted
one, but this is my first. I'm now running across a problem, and I
don't know quite what to make of it.

The idiot light on the dash that tells you when your brake light is out
comes on when I step on the brakes. That is not strange. However, it
also flashes when I am driving. The rate of flashing is directly
proportional to the speed of the car. At any speed above about 35 it is
just a dimly lit light. I have a theory that the ABS wheel speed
sensors are somehow tied into the warning light to alert that the ABS
has gone awry and mine is somehow tripping the system at some points of
a wheels travel, but not at other points. Is this a valid diagnosis. I
am not even sure that the car has ABS. I can't find anything that looks
like an ABS unit. But then again, I don't know everything about this
car. I come from the world of fast gas powered cars.

Any ideas of what it might be?

I thought of perhaps jacking the car up and spinning each wheel to see
which one causes it. Although, I'm not really sure where to go after
that. I fear an oscilloscope may be involved.

I'm open to any advice anyone can send my way.

Bill