First, all the lights are not bright, the reasons: 1. The battery to the main switch between the power line is broken, 2. The main lamp switch is broken, 3. The main power fuse is burnt. Second, the high beam or low beam is not bright, the reasons are: 1. Wire break or poor plug contact or bulb damage, 2. High beam or low beam fuse burned, 3, light relay damaged, 4, wire grounded, 5. The main lamp switch is broken. Third, the headlights are dim, the reasons are: 1. The fuse is loose, 2. The wire connector is loose, 3. The headlight switch or relay is in poor contact, 4. The generator output voltage is low, 5. The electric equipment leaks, the load is increased. Poor grounding. Fourth, the headlights on one side are normal and the other side is dim. Causes: 1. The ground side of the headlights is poorly grounded. 2. The wire plugs are not in good contact. Fifth, the headlights, the rear lights are normal, the small lights are not bright, the reasons: 1. The main switch is damaged, 2. The fuse is burnt, 3. The small light bulb is damaged, 4. The small light circuit is broken, 5. The relay is damaged. Sixth, turn on the small light, one side is bright, the other side small light is weak and the indicator light is the rear turn indicator light is also on, not flashing. Cause: The small lamp with poor brightness is poorly grounded (refers to the lamp with the lamp case grounded). Seven, step on the brake pedal, the brake light does not light, the reasons: 1. The fuse is burned, 2. The brake switch is broken, 3. The wire is broken, 4. The grounding is bad, 5. The lamp is damaged. Eight, the bulb is often damaged and the generator output voltage is too high. Withstand high voltage up to 750V (IEC/EN standard) UL 94V-2 or UL 94V-0 flame retardant housing Anti-falling screws Optional wire protection 1~12 poles, dividable as requested Maximum wiring capacity of 10 mm2 10 amp Terminal Blocks,high quality terminal connectors,10 mm² terminal blocks,BELEKS T10 series connector strips Jiangmen Krealux Electrical Appliances Co.,Ltd. , https://www.krealux-online.com