When I bought my car the right blinker would stop blinking whenever the running or headlights were turned on. The left blinker works perfectly all the time. I replaced all bulbs and the headlights but the right blinker still stops blinking when i turn the lights on. The bulb for the right blinker lights up both filaments when the running and headlights are on, where as the left only lights up one filament with the lights on. What is causing my right blinker to not blink with the lights on when my left blinker works fine?