i have a problem- when i put my left signal on all three of my rear lights blink, i have a third brake light(just to clarify), when i put the right signal on it stops the left and third brake light blinking and the right signal works as it should. when no blinkers are on i can still hear the flasher sound but no lights are on. any help will be gratefully received. thanks in advance. i previously posted this in the wrong section of forums.