If the rear tail lights of a motorcycle have stopped working while the turn signals continue to function, there are a few potential reasons for this issue:
Burned-out bulbs: The tail lights may have burned out, and it's possible that both bulbs have failed at the same time. In this case, replacing the bulbs should solve the problem.
Faulty wiring or connections: A loose or disconnected wire in the tail light circuit can prevent the rear lights from working while the turn signals still function. Inspect the wiring connections and look for any signs of damage, loose connections, or corrosion. Repairing or replacing any faulty wiring or connectors should resolve the issue.
Blown fuse: Motorcycles have separate fuses for different electrical circuits. If the tail light fuse has blown, it could result in the rear lights not working while the turn signals still operate normally. Check the motorcycle's fuse box and replace any blown fuses with the correct amperage.
Faulty switch or relay: The issue could be related to a malfunctioning tail light switch or relay. These components control the activation of the tail lights, and if they are faulty, it can result in the lights not working. Inspect the switch and relay, and if necessary, have them tested or replaced by a qualified technician.
Faulty tail light assembly: In some cases, the tail light assembly itself may be faulty or damaged. This could be due to a wiring issue within the assembly or a problem with the internal components. If all other possibilities have been ruled out, replacing the tail light assembly might be necessary.
It's recommended to consult a professional motorcycle mechanic or electrician to diagnose and resolve electrical issues, especially if you are not familiar with electrical systems and wiring. They will have the expertise and tools to accurately identify the problem and perform any necessary repairs.