The function of the rear wiper motor of a car
The rear wiper motor of a car is the power core of the wiper system, responsible for providing driving force for the rear wipers and ensuring the cleanliness of the rear windshield.
Its main functions include:
Youdaoplaceholder0 provides power and motion conversion : Through the built-in permanent magnet motor driving the turbine worm and other reduction mechanisms, the rotational motion of the armature is converted into the reciprocating swing of the wiper arm, thereby driving the wiper blade to move back and forth on the rear windshield to remove rainwater, dust and other attachments.
Youdaoplaceholder0 Speed adjustment function : It adopts a three-brush or potentiometer structure. By changing the number of series coils or the current intensity, it can achieve multi-speed control such as low speed, high speed and intermittent gear, adapting to different weather conditions.
Youdaoplaceholder0 deceleration and torque output : The gear reducer at the rear end of the motor reduces the speed and increases the output torque to ensure that the scraper arm has sufficient force to complete the cleaning action when swinging.
Youdaoplaceholder0 System integration and reliability : As the core of the wiper drive assembly, its output shaft precisely controls the wiper arm trajectory through the fork and spring return mechanism, ensuring a clear rear view and enhancing driving safety in complex road conditions.
The malfunction of a car wiper motor may be caused by a variety of factors. Here are some common reasons:
Youdaoplaceholder0 Internal damage of the motor : After long-term use, the wear or quality issues of internal parts of the motor may cause short circuits, burnout of the coil or faults in the control module, making the motor unable to operate.
Youdaoplaceholder0 Fuse blowout : If the fuse of the circuit protection device blows due to excessive current, it will cut off the power supply, causing the motor to lose power and stop working.
Youdaoplaceholder0 line fault : Open circuit, short circuit, poor contact or aging of the power supply line or grounding line can affect power transmission. It is commonly seen in line wear or corrosion at connection points after long-term use.
Youdaoplaceholder0 Relay or switch failure : Damage to the relay in the control circuit or poor contact of the wiper switch will interrupt the signal, preventing the motor from receiving instructions.
Youdaoplaceholder0 Mechanical transmission problem : Disengagement, rust, deformation or loose connection of the wiper connecting rod mechanism can impede the power transmission of the motor, causing the wiper blades to get stuck or be unable to move.
Youdaoplaceholder0 External factors and improper maintenance : Insufficient motor lubrication, accumulation of dust and dirt, long-term operation in harsh environments (such as high temperature and high humidity), or aging and deformation of wiper blades increasing friction load, may all accelerate motor failure.
The method of activating the rear wiper and the troubleshooting skills are crucial for ensuring driving safety and the normal use of the vehicle
First of all, let's take a look at how to activate the rear wipers of the Lavida. The control of the rear wiper is usually integrated into the wiper control lever on the right side of the steering wheel. The operation of activating the rear wipers may vary slightly for different years and configurations of Lavida models. Under normal circumstances, if you push the control lever away from your body once, the rear wiper will operate in single-wiper mode, that is, it will only perform one wiper action.
If you need the rear wipers to keep working, you can push the control lever away from your body and hold it for a period of time. At this point, the rear wipers will enter the continuous wiper mode, and the frequency of wipers will vary depending on the vehicle's Settings. Some models also support the intermittent wiper function of the rear wipers. By adjusting the knob or button on the control lever, the time interval for the intermittent wiper of the rear wipers can be adjusted.
When the rear wipers malfunction, a systematic inspection is required. First, check the fuse of the rear wiper. The fuse is located in the fuse box of the vehicle. Find the fuse corresponding to the rear wiper and check if it has blown. If the fuse blows, a fuse of the same specification needs to be replaced.
Next, check the motor of the rear wiper. One can initially determine whether the motor is working properly by listening to the sound. When the rear wiper is turned on, if you can hear the sound of the motor rotating but the wiper does not move, it may be that there is a problem with the connection between the wiper arm and the motor. You need to check whether the connection part is loose or damaged. If you can't hear the sound of the motor rotating, it might be a fault with the motor itself. You need to further check the motor's circuit and its working condition.
It is also necessary to check the water spray system of the rear wipers. If the rear wiper doesn't spray water properly, it might be due to a clogged nozzle or a broken water pipe. You can use a fine needle to unclog the water nozzle and check if there is any damage or bending in the water pipe. In addition, the rubber strip of the rear wiper is also a component that is prone to problems. After long-term use, the rubber strip will wear out or age, resulting in poor water scraping effect. You can observe whether there are cracks or wear on the surface of the rubber strip. If so, the rubber strip needs to be replaced in time.
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