What's the matter if both the tail light and brake light of the motorcycle are not working?
2 Answers
If both the brake light and running light are not working, check whether the bulb is damaged, whether there is poor contact between the bulb and the wiring, and whether the grounding wire is not properly grounded. If only the brake light is not working, in addition to the above, also check whether there is a problem with the brake light switch. The following are specific reasons: Issue with the ignition lock: The power supply line for some lights needs to be connected through the ignition lock. A replacement ignition lock with fewer wires may cut off the power supply to the lights. You can compare the original ignition lock with the corresponding wiring in the vehicle's wiring harness and reconnect the wires as needed. Poor wiring contact: You can tap the wires with a tool. If that doesn't work, send it for repair.
I've been riding motorcycles for many years and have encountered situations where both the taillight and brake light stopped working simultaneously, which felt quite concerning. The most common cause is a burnt-out bulb, as motorcycles experience a lot of bumps, leading to shorter bulb lifespans. First, check if the bulb is blackened or cracked. Next, it could be a blown fuse—open the fuse box and inspect the corresponding fuse; if it's broken, replace it. Another possibility is a short circuit or broken wire, especially due to loose or aged connectors. I recommend manually plugging and unplugging them after parking. If the brake light isn't working, it might also be a faulty brake switch, such as a sensor malfunction preventing signal transmission. Safety-wise, this is extremely dangerous, especially when riding at night. Pull over as soon as possible, turn on the hazard lights, and avoid riding further—get it fixed immediately. For regular maintenance, consider using shock-resistant bulbs to extend their lifespan when replacing them.
