Check the screen first

Stop in a safe place. Note the battery indication, assist level, and any error code. If the screen is blank, follow the battery charging guide and contact support if it remains unresponsive.

1. Identify the display. Use the bike and display guide to find the correct manual. For an L300, use + / − to select an assist level as described on page 6 of its manual. For another display, follow its own instructions.
2. Check the brake levers. Make sure they return normally when released. If a lever sticks or the display reports a brake error, stop riding and contact support. Do not disconnect or bypass brake-cutoff wiring.
3. Check visible cables with power off. Look for a loose, pinched, or damaged cable. On a Defiant, check the visible motor-wire connection near the rear fork. Do not pull wires, force a connector, or reconnect anything while powered on; send support a photo if unsure.
4. Record any error. Use the display-specific code reference. A code identifies a fault condition, not necessarily a part that needs replacement.

Do not change voltage, wheel size, drive mode, or factory settings to troubleshoot a motor problem. If the problem remains, avoid further riding and prepare a service request. Do not operate the throttle or motor while inspecting cables or brakes.

References: L300 manual, L04NH manual, and Defiant motor-connection note.