Check your heater blower and wipers.  If they also don't work it is
the electrical portion of the ignition switch.

see this posting:
http://gerry.vanagon.com/cgi-bin/wa.exe?A2=ind0501d&L=vanagon&F=&S=&P=28900

>Hi!
>
>The headlights (both high and low beam) have ceased to function on my
>87 Westy. I have parking lights, tail lights license  and plate