Find the relay use a test light on it to make sure current is passing through to check if it’s gone bad. I’m betting that’s what it is. The other possability is searching for rotted (green) wires.
there’s going to be a lot of using a test light traching down the issue. this job isn’t all that hard.
this isn’t off topic. don’t make it that way. newman at least slightly covered his ass by repeating what i said.