turn signal trouble

Hey guys Im having a time with my 65 dart blinkers. When I turn the key on and hit the blinker right and blinker left they work fine except the driver side is very dim. When I turn the head lights on its the same thing except the indicator. When I switch to right turn signals the column blinks left and when I switch to the left it blinks to the right. Anyone know what cause this. Again left blinker bulb works but is very dim and when I turn the headlights on the indicators are opposite on the column!