I have a 1979 264 and it has developed a strange electrical problem I can't figure out. Recently while driving at night my dash lights went out and at the same time the tail light out indicator came on. The next day I checked everything out and everything seemed OK. All marker lights were working and the dash indicator was not lit. However, at night this same thing occurs. It is only when the headlights are on. When the headlights are on the right rear tail light goes off, the dash lights go off and the marker light out indicator lights up.

Anyone have any idea where to start on this one? I'm baffled.

Thanks,

Sully