Turn Signal, Lights on, No Flash, Flasher OK

Good day all!
1985 ZX550. Turn signals will light up with the switch, but they don’t flash. Both left and right act the same. I tested the flasher with a circuit tester and it flashes the bulb. 
Tried the hazards, and the right side flashes, the rear light as expected, front light almost like a flicker flash(?) and the left side doesn’t do anything. On the left, the front lights up and stays on while the rear doesn’t light up at all. 

Thoughts? Could the bulbs be garbage? I’m going to try changing out the rear left bulb with an 1037 and the front right with an 1157. 

Or, would this be a ground issue? If so, does anyone know where the ground is on these bikes? I’m newer to these machines and am process of getting it road worthy. 

Thank you!