[joeydurango]

Thanks, Coley. Believe it or not, I already looked at that! (I had seen that same issue in another thread.) Pulled the lenses off the four turn signals (the only 1157's, right?), visually inspected while off, and for good measure, visually inspected with parking lights and turn signals on, so I could actively see each filament doing its job.

I just took a look at the headlight switch. It looks like a newer replacement, probably done at the same time as the tach install and new printed circuit (at least several years ago, before I owned the truck - but not tons of use).

I think I'll pull the steering wheel next, take a look at the signal switch. Arg. Gotta love these old things. My wife claims I love it when something goes wrong with the truck... I kind of agree until it actually happens...