Hopefully it's just the socket for the bulb -- take the bulb out and
take a look. They tend to corrode, and a bad connection will cause low
current flow (and a melted socket from the extra resistance, alas).
The bulb can also be going bad, and this will cause the problem as well.
Clean and grease, or a new bulb should fix it.
However, I found I had a wiring problem on the 300D, or a bad bulb out
warning relay ($200 +), so I ran a new wire. The lamp out bulb is
always on on low beam and most of the time now anyway -- I suspect the
relay, but haven't popped for one yet.
Check the voltage at the lamp socket -- if you don't have battery
voltage, it's wiring or the relay.
Peter
