18. LIGHTS/ SWITCHES ATV 50 Bulb Remove the bulb and check the bulb for damage. Replace with a new one if necessary. MXU 50 REVERSE/MXU 50: Remove the bulb socket by turning it Bulb Socket Bulb counterclockwise. Remove the bulb. Install the bulb in the reverse order of removal. IGNITION SWITCH MX'ER 50: Check for continuity between the wires indicated below. Color Black Red Black/ Green Position White OFF ON 18-6