1982 300sd turn signals not working

[BBoting]

I got a 300sd as a project car and I have been mostly successful with it but one thing still keeps me from moving forward with the project. The turn signals. They don't turn on when I use the lever that should activate the lights to say you're turning. They turn on when you use the hazard lights and nothing seems to be disconnected, I have switched the relay but nothing. so I am at a loss. I am open to anything.