Common Problems with Automotive Wiper Motor
Q1. What is the speed of a wiper motor?
A. The wiper motor speed is typically 45 rpm (normal speed) and around 65 rpm (at fast setting). It is also available in 6V, 12V, and 24V configurations. A typical wiper motor draws 2 to 4 amps of current. Most wiper systems allow for two speed settings of the wipers. In such a setup, the motor uses three brushes instead of two.
Q2. What does the wiper motor pulse board module do?
A. The module is a circuit board that contains the electronic control circuitry of the wiper system. It determines various actions, including speed settings, wiper parking, and the switching on and off of the wiping mechanism. In short, it governs the operation of the wiper motor and linkage. Although the module is protected against the harsh conditions of the engine bay, it can still be damaged. Fortunately, it is a replaceable component.
Q3. Why does a wiper motor need a relay?
A. A relay uses a smaller current to switch on a larger current for the motor. Some motors use relays, while others do not. Generally, the wiper motor's current rating determines whether a relay is needed. Motors with higher ratings require one, while low-power types do not. If you have a rear windshield wiper, its motor may use a relay.
Q4. How long should a windshield wiper motor last?
A. The lifespan of a wiper motor is as long as that of the car. However, this does not always happen. Depending on usage and operating conditions, the component tends to fail earlier.
If you have to use the windshield wipers daily, the motor is likely to wear out after a few years. Electrical faults can also shorten its lifespan if they cause the wiper motor to burn out. Poor maintenance of the wiper linkage can also put stress on the motor. To extend the lifespan of the wiper motor, here are some useful tips
Ensure regular maintenance, such as lubricating the moving parts of the connecting rod and replacing worn components.
Always manually release wiper blades that have not been used for a period of time.
Avoid using frozen wiper blades to prevent placing stress on the motor.
When not in use, always ensure the wipers are in the correct parked position. They will not place stress on the motor at startup.
Develop the habit of turning off the wipers before the engine to ensure they return to the parked position correctly.
Q5. What are the signs of a faulty car wiper motor?
A. The wiper motor contains mechanical and electrical components. These can cause different symptoms when damaged or worn. With a keen eye, you can easily spot these signs. Here is how to tell if a windshield wiper motor is bad.
The wipers do not move when turned on.
The wipers do not stop when you want them to.
The wipers move slower than usual.
You are unable to change the wiper settings, such as moving to a higher speed
The wiper motor makes a grinding or rattling noise
When turning off the wipers, they do not "park" or return to the very bottom of the windshield
Most signs are caused by a worn-out motor that needs replacement, or damage to individual components that can be replaced. Clogging is also another reason you may see symptoms of a faulty wiper motor.
Q6. Can a wiper motor be repaired?
A. Yes, they can, depending on the nature of the damage. Worn brushes can be replaced, or the armature can be rewound. Other replaceable parts include the gears in the motor's transmission. Cleaning a clogged wiper motor or its transmission components can restore its function without replacement. Many people do not repair wiper motors. Instead, they replace the entire system.
Q7. What is the price range for an automotive wiper motor?
A. The cost of a wiper motor varies by manufacturer, ranging from 200 yuan to 2000 yuan. Depending on the type of motor or model and the vehicle used, the amount may be lower or higher. Different wiper motor suppliers will also have different price tags for the same product. When purchasing a replacement motor, we recommend comparing prices from different suppliers.
Q8. What is the average cost to replace a wiper motor?
A. You can expect to pay between 100 yuan and 500 yuan for the wiper motor replacement labor. This does not include the cost of purchasing the component, which for most models ranges from 200 yuan to 2000 yuan. If you choose to do it yourself, make sure you have instructions for the procedure. Wiper motor replacement instructions are usually included in the product packaging.
Question 9. Can I replace the wiper motor myself?
A. The location of the wiper motor makes the task somewhat difficult. There are several components to remove, and you need to have some knowledge of the process. You will also need the right tools. If you have both the knowledge and the installation equipment, a DIY job can save you around 1,000 yuan. That said, it is always recommended to have a mechanic complete the work.
Question 10. How do I purchase a windshield wiper motor?
A. Wiper motors are manufactured for specific car brands.