[DanEC]

Disconnected the trun signal power lead to front PL and the yellow lead from the turn signal switch and tested for continuity between both ends - tested OK for continuity. Tested both ends to ground and meter was silent.

Assuming from this there isn't a short in the run to the front bulb.

Edit: OK, think I made some progress. The only other power into the turn signal switch is from the headlight dimmer relay. I disconnected the Tan/White stripe wire from the headlight dimmer relay from the turn signal switch and the turn signals work OK. So, I assume that might indicate a bad headlight flasher relay? Or possibly still a faulty turn signal switch? Any idea how to figure out which one?