Replaced Alternator.2 Days later alternator light came on speedometer quit working car wouldn’t idle. Changed fuse. Today speedometer quit working alternator light came on for about a minute & light went out speedometer started working. About 15 mile later, speedometer quit again, alternator light came on but This Time, they both kept clicking off& on & another green light to the right of speed blinking off & on all the while making a clicking sound as if the emergency blinkers were on. Car still running good. Heater working as well as lights & radio . HELP