tail light making me crazy

problem solved! went through all my wires again from the plug back. all terminals tested out properly but i still couldn't get the lights to function properly. added an extra ground but that didn't solve it. turns out that after i tested the wires the first time i must have slipped the socket back onto the wires reversed, putting the taillight wire to the blinker filament and the blinker wire to the tail light filament. switched them back and eureka, everything works as it should. live and learn.