The reasons for the reversing radar not beeping are as follows: 1. The reversing radar switch is turned off: Most cars have a control switch for the reversing radar on the central control panel inside the vehicle. If it is turned off, the reversing radar will not work. Solution: Turn on the reversing radar switch. 2. Reversing radar circuit failure: When the reversing radar circuit ages or breaks, the reversing radar will not function properly. 3. Check if there is current in the main unit's power line: When you find that the reversing radar is not beeping, first check if the main unit's power line is properly connected and if there is current; then check if the radar main unit line is loose. If neither of these is the issue, the problem may lie with the radar itself. 4. Buzzer damage: If the problem is confirmed to be with the reversing radar, the first possibility to consider is that the buzzer is damaged. In this case, you need to purchase a new buzzer and install it; additionally, recall if your car has undergone any recent modifications. If so, it is possible that the reversing radar circuit was damaged during the modification process, and you will need to take the car to a repair shop or 4S store for inspection. 5. Check if the circuit connection at the bumper is intact: When you find that the reversing radar is not beeping, you can also check if the circuit connection at the bumper is intact, then check if the reversing light turns on when you shift into reverse. If it doesn't, check if the reversing light's connection switch is damaged. Also, check if the computer displays any fault codes. If none of these issues are present, inspect the reversing radar itself for any problems.
