Well, maybe I'm not that smart after all. Maybe it's not a headlight fuse. Ignition works fine and truck starts right up but it's the 30 amp fuse in the middle of my fuse board that pops and then headlights/tailights don't work. She does have the original style headlight switch. The turn signal unit is one of those chrome units that strap onto the steering column. I'll take a look at the dimmer switch but she's a fair weather truck and if the roads wet she stays in the garage. Thanks for your responses.