What are the common issues when motorcycle spotlights fail to light up?

[StBrooklyn]

It is a failure in the lighting signal system. The failure rate of motorcycle lighting signal systems is relatively high. The main causes of failure include: loose wire connections, poor contact, short circuits, ground wire breaks, and excessively high voltage adjustment of the voltage regulator. Common diagnostic methods include the spark test method, ground spark test method, or power short-circuit method. More details are as follows: 1. Front headlight not lighting up: The main reasons for the front headlight not lighting up are: broken power wires, poor ground wire contact, blown fuses in the circuit, burnt-out filaments, poor contact between the bulb base and socket, or faulty/damaged contacts in the light switch. 2. Incomplete high/low beam function: Some motorcycles may lack either high beam or low beam functionality. If the light switch is set to the headlight position and only the high beam works while the low beam does not, or vice versa, this is referred to as incomplete high/low beam function in the headlight.