1988 Lebaron GST electrical problem

I'm having a strange problem with my 1988 Lebaron GTS. While driving it at night, the headlights went out for just a split second and then came back on. At the same time, the radio and interior/dome lights quit working. All the lights (headlights, brake lights, signals, dash lights etc) are all now working fine, except for the radio and interior lights. So far this has only happened once, but the radio and interior lights still do not work. I have checked all the fuses and they are fine. Any suggestions?