Eric,

This may sound a bit far-fetched, but I have seen a similar problem when
one of the filaments in the headlight bulb broke, and made contact with
the other filament.  The effect was to cause all of the filaments in all
of the headlights (and the blue high-beam indicator) to illuminate dimly.
I found it by unplugging all the headlights, then plugging them in one at
a time until the offending bulb was found.

Regards,
Jon Kanas
Kanas@qadas.com