I failed to mention it is a 1991 Prevost Marathon. The problem with turn signals. They will flash for a while and then all will stop flashing. I suspect the flasher it self how ever I am un able to locate it. There seems to be two relays wired in to the panel outside of the driver side electrical door. Does not looks original. Also when flashers work there are looks like two relays in the back rear end clicking at the metal panel above the engine,