Frustrated!

Cruzin' down the road in Ol' Blue last night when the cell phone rang
and it was a friend whom I have now heard from in two years. 'Course had
to talk so pulled off the highway and stopped for safety reasons, shut
the vehicle down and had a nice conversation. When I got ready to go -
started Blue up, turned on the headlights - no head lights. I fretted,
tried this and that, checked the fuses - nothing. Had to leave Blue
parked and catch a ride home.

This morning I picked Blue up - still nothing. but Blue was drivable so
I came on home. Running lights work - turn signals, flashers, break
lights, dash lights - but for one. The speedometer light is out.

This van has the SA headlights, has the headlight switch bypass relays
installed.

Driving home last night I did think I could detect an almost
imperceptible scent of something electrical. Change in ozone, something.
Just barely discernible. A molecule or two. So maybe I have a short
somewhere. The big question is where? And where to start looking on
this.  Any suggestions would be appreciated.

Thanks

John