What's the matter if both the tail light and brake light of the motorcycle are not working?
4 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.
As someone who frequently works on car repairs, I don't consider non-functioning motorcycle taillights and brake lights to be major issues. Most of the time, it's due to bulb aging—motorcycles vibrate intensely, which easily burns out filaments, and you can replace them yourself. Alternatively, it could be a fuse problem; check if the fuse is blown, typically located under the seat or near the dashboard. Wiring faults are also common, such as poor contact or short circuits in the wires—remove the lamp cover and use a multimeter to test continuity. Brake light failures may stem from a damaged switch, like when the switch doesn't respond when braking. These issues need prompt attention, or you risk rear-end collisions. For maintenance, regularly clean connectors and inspect bulb conditions to prevent problems—don't wait until all lights go out to panic. Non-professionals are advised not to tamper with circuits, as damaging other components could lead to bigger headaches.
The taillight and brake light suddenly not working is really dangerous, especially when riding at night or in the rain. I've seen accidents caused by this, possibly due to a blown bulb or a burnt fuse. Stop immediately to check and avoid risks. Simply check if the plug is loose, as a broken wire can cause all lights to go out. Safety first: Turn on the turn signal or hazard lights right away, pull over, and stop riding. Develop a habit of checking the lights before starting the bike and inspect for circuit aging issues during regular maintenance. Don't delay; go straight to the repair shop for the safest solution.
