The function of the rear flat light of a car
The rear position lights of a car (also known as side marker lights or small lights) are important lighting fixtures at the rear of the vehicle. Their main function is to enhance the visibility and safety of the vehicle in various driving scenarios. The following is a summary of its core functions:
Youdaoplaceholder0 indicates the presence and width of the vehicle : At night, early morning, dusk or in bad weather (such as fog, rain), the rear position lights can clearly display the outline and approximate width of the vehicle, helping other road users (such as oncoming vehicles or vehicles behind) accurately determine the position and space of the vehicle, avoiding collisions due to misjudgment of distance or width.
Youdaoplaceholder0 Reverse warning : When the driver shifts into reverse gear, the rear lights will automatically illuminate, sending a clear signal to pedestrians and vehicles behind that the vehicle is moving backward, thereby prompting others to give way in time and reducing the risk of reversing accidents.
Youdaoplaceholder0 Brake signal assistance : When braking, the brake light section in the rearview lights will quickly turn on red light, serving as a braking signal to remind the driver of the vehicle behind to slow down in time, effectively reducing the probability of rear-end collisions.
Youdaoplaceholder0 Enhance overall driving safety : By increasing the visibility of the vehicle in various scenarios such as meeting oncoming vehicles, overtaking, and temporary parking, the rear position lights provide a fundamental guarantee for driving safety at night and in low visibility environments.
The layout of the rear position lights is usually located at both ends of the rear of the vehicle. Some large vehicles or high-end models may add width indicator lights on the roof or sides to further optimize the warning effect.
The failure of a car's rear light to work is usually caused by reasons such as damaged bulbs, circuit faults, blown fuses or malfunctioning control components . The following is a detailed description from the perspective of common faults:
Bulb-related faults
Youdaoplaceholder0 Bulb burnout or poor contact : The filament of the bulb melts, the glass body breaks, or the contact point with the lamp holder oxidizes and loosens, resulting in the inability of current to conduct. Halogen lamps, LED lamps and other types may all be damaged due to the expiration of their lifespan or frequent switching.
Youdaoplaceholder0 Aging of the lamp socket or incorrect specifications : Corrosion, deformation of the lamp socket or installation of bulbs with mismatched power affect the stability of the circuit connection.
Circuit system problem
Youdaoplaceholder0 line fault : Open circuit, short circuit or aging of the wire (such as damaged insulation), resulting in the interruption of current transmission. Bumpy or high-temperature environments can accelerate the aging of circuits.
Youdaoplaceholder0 Fuse blowout : When the circuit is overloaded or short-circuited, the fuse automatically blows to protect the system. A fuse of the same specification needs to be replaced.
Youdaoplaceholder0 Abnormal voltage : Insufficient battery power or unstable output voltage of the generator leads to insufficient power supply to the bulb.
The control component malfunctions.
Youdaoplaceholder0 Relay or combination switch damage : The relay or switch that controls the on-off of the taillight is faulty and unable to send working instructions.
Youdaoplaceholder0 Light switch fault : Poor contact or incorrect position of the switch affects the conduction of the taillight circuit.
Car rear light malfunctions may involve various situations, such as one side not lighting up, all lights not lighting up, or remaining constantly on. Common causes include damaged bulbs, circuit problems, blown fuses, switch failures, or abnormal control systems.
Youdaoplaceholder0 common causes of faults
Bulb aging or damage : prolonged use of the bulb may cause the tungsten filament to burn out or the glass to break, which is the most common reason for the rear light not lighting up.
Youdaoplaceholder0 Circuit problem : A blown fuse, short circuit or poor contact (such as a loose connector) can interrupt the current supply, causing the rear light to fail to work.
Youdaoplaceholder0 switch or controller failure : Damage to the light control switch, abnormality of the brake switch or failure of the taillight control module may affect the normal switching state of the rear lights.
Youdaoplaceholder0 external factors : misoperation (such as the switch not being turned off), sensor failure (such as the door not being closed triggering), or software errors may also cause the rear lights to remain on constantly or be abnormal.
Youdaoplaceholder0 simple troubleshooting steps
Youdaoplaceholder0 Check the bulbs : Turn on the turn signal or taillight switch and observe if the rear lights are on. If it doesn't light up, check whether the bulb is burned out or loosely installed. Replace it if necessary.
Youdaoplaceholder0 Check the fuse : Inspect the taillight fuse in the vehicle fuse box to see if it has blown. If it has blown, replace it with a fuse of the same specification.
Youdaoplaceholder0 Check the connectors and circuits : Open the trunk and check if the rear light connectors are tight and if the circuits are damaged or loose.
Youdaoplaceholder0 Reset or turn off the switch : Make sure the light switch is not accidentally touched. Try to turn off the headlight or turn signal switch and observe whether the rear light goes out.
If the above steps fail to solve the problem, it may involve faults in the control module or complex circuits. It is recommended to contact professional maintenance personnel in a timely manner for inspection to ensure driving safety.
If you want to know more, keep reading the other articles on this site!
Please call us if you need such products.
Zhuo Meng Shanghai Auto Co., Ltd. is committed to selling MG&MAXUS auto parts welcome to buy.
