turned out to be a bad ground in the socket, no pulling the wheel, yea

 

What do I look for if the dash turn signal lights don't shine at all. Front and rear lights are bright and flash.

 

Wow, zombie thread!


Have you checked the bulbs in the instrument cluster? Could just be burned out.
Do your other indicator lights & gauges work? There could be a grounding problem with the cluster.


I'd get a multimeter and start probing around - see if you have +12V to the bulbs, see if you have good ground, etc.


Wiring diagrams for several years can be found here:
1973-1979 Ford Truck Wiring Diagrams & Schematics - FORDification.net