On my 72 Cutlass passenger side don't blink or slow blink. Front and rear bulbs come on.
DRiver side works perfectly. Also emergency flashers work correctly front and rear.
Replaced the flasher relay got no joyAny suggestions would be appreciated

 

Which flasher did you replace? The one in the fuse block or the one under the dash beside the steering column?
Fuse block = 4-way hazard flasher
Under dash Steering column = turn signals

 

 

I replaced the one in the fuse block

 

Wrong one

 

The same flasher operates both sides. If at least one side works, replacing the flasher is a complete waste of time and money.

 

Maybe a intermittent ground issue? As has been discussed in numerous threads before, start with check for voltage in the trunk wiring, then move forward from there. Also, have you replaced the switch?

 

Have not replaced the switch. Will check for good ground

 

Not sure if it's an 1157 bulb, but those sockets ground when they clip into the light bulb housing. Perhaps the clip is broken or not fully clipped into the housing. I'd check there before playing with wiring. You can even use a small jumper to ground the socket and see if they work.

 

Attached a ground line to sockets with no improvement. A friend of mine is going to give me hand. He is better at electrical. I'll post the result

 

My buddy added this additional ground and solved the issue. I tried and it didn’t work, tells you all you need to know about my skills

 

Thanks for all your help. Greatly appreciated