[army brat]

I've just within the last week gotten my jeep completed,
I am having some issues with the indicators work sperradickly.
They will work fine for a bit then stop working or now just turn on but not flash. I've checked the connections one seemed to be loose but tightened it up with no change. Does the mechanism or the flasher unit on the fire wall cause these issues?

Any help would be appreciated

Thanks