I have a 1985 Ford F150 with a faulty turn signal. The left turn signal works perfectly. When I activate the right turn signal, the indicator light in the cab turns on solid (no blinking) and there is no characteristic clicking noise. Neither the front right lamp nor the rear right lamp light up at all. Any suggestions?
Thanks for reading 
I would start by checking to see of a lamp is burned out?
Bulbs would be my first thought as well. If the bulbs are good I would then look at the flasher.
~Michael
An 85 “should” use the same bulbs for turn signals & emergency flashers.
Do the emergency flashers work?