Hazard Function Add-on Unit for CBR1100XX Blackbird Compatible with basically all model years. Note: For single-filament bulbs. Not compatible with front W-bulb types. --- Installation --- ① Connect between the left switch connector. ② Connect the included switch. ③ Hazard lights activate when the switch is turned ON. Can be used with either incandescent bulbs or LEDs. Operation is not guaranteed for machines with custom wiring. As I also ride a Blackbird, feel free to ask any questions. The wire colors may vary depending on the manufacturing situation.