My Battery Keeps Dying!

["Brian K" <bk@br213mail.nrel.gov>]

I have a 1988 90 that I bought a few months ago.  All was well until a few
days ago when I left the rear defroster on.  It stayed on while I was at work
and drained the battery.  Today I go out and the battery is dead again. 
Nothing was left on (that I can see).  One recent development is that the red
lights on the door handles that display the window switches will not go out. 
This is also true of the seat heater lights on the center console.  Are there
any ideas as to what is going on and why?  This is becoming a big hassle.

Thanks,
Brian