So, my Z32 has the HID lights. They blinkers blink as they should until I turn on the headlights. Then, the left blinker still works but it blinks real fast, as if you had a burned out bulb in the front or back. But, all bulbs are good. The right blinker works as it should with headlights on or off. Suggestions?

 

Check for a bad earth on your lighting circuit

 

Check that both filaments are working in your signal bulbs. I've had this problem and just kinda wiggled them around and they started working again.