If you’re looking to replace or repair the wiper motor on your vehicle, it’s important to have a good understanding of how the motor is wired. This article will provide you with a detailed explanation of the 3 wire wiper motor wiring diagram, as well as some frequently asked questions about wiper motor wiring and maintenance.
What is a Wiper Motor?
A wiper motor is an electrical device that powers the windshield wiper system in a vehicle. Wipers are used to clear the windshield of rain, snow, dirt, and other debris, providing the driver with a clear view of the road ahead. The wiper motor converts electrical energy into mechanical motion, which moves the wiper arms and blades back and forth across the windshield.
Types of Wiper Motors
There are two main types of wiper motors: permanent magnet (PM) motors and series wound (SW) motors. PM motors are commonly used in newer vehicles, while SW motors are found in older vehicles and heavy duty applications. PM motors are generally more efficient and require less maintenance than SW motors, but they are also more expensive.
Components of a Wiper Motor System
The wiper motor system consists of several components, including the motor itself, the wiper arms and blades, the wiper linkage, the wiper switch, and the wiring that connects all of these components together. The motor is typically located under the hood, near the bottom of the windshield, or in the cowl area at the base of the windshield.
Wiring Diagram for 3 Wire Wiper Motor
A 3 wire wiper motor is typically used in vehicles that have a single speed wiper system. The wiring diagram for a 3 wire wiper motor is relatively simple:
| Wire Color | Function |
|---|---|
| Black | Ground |
| Green | Low Speed |
| Yellow | Power |
The black wire is connected to the chassis or ground of the vehicle. The green wire is connected to the wiper switch, which controls the low speed setting of the wiper motor. The yellow wire is connected to the battery or power source, supplying power to the motor.
Wiring Diagram for 3 Wire Wiper Motor with Park Function
Some vehicles may have a 3 wire wiper motor with a park function, which causes the wipers to stop in a specific position when turned off. The wiring diagram for a 3 wire wiper motor with park function is slightly more complex:
| Wire Color | Function |
|---|---|
| Black | Ground |
| Green | Low Speed |
| Yellow | Power |
| Dark Blue | Park Signal |
The dark blue wire is connected to the wiper switch and provides a signal to the motor when the wipers are turned off. This signal tells the motor to park the wipers in a specific position. The other wires are connected in the same way as in the 3 wire wiper motor without park function diagram.
FAQs
How do I test my wiper motor?
To test your wiper motor, you can use a multimeter to check for continuity between the different wires. You can also connect the motor directly to a power source to see if it starts up and runs smoothly. If you’re not comfortable with electrical testing, it’s best to have a professional mechanic or technician perform the test.
How do I replace my wiper motor?
To replace your wiper motor, you will need to remove the old motor from the vehicle and install a new one in its place. This can be a complex and time-consuming process, especially if you’re not familiar with automotive electrical systems. It’s best to have a professional mechanic or technician handle the job.
How do I maintain my wiper motor?
To keep your wiper motor in good working condition, it’s important to perform regular maintenance, such as cleaning the wiper blades and arms, checking the wiring for damage or corrosion, and lubricating the moving parts of the wiper linkage. You should also replace the wiper blades and arms as needed to ensure proper operation of the wiper system.
What can cause my wiper motor to fail?
There are several factors that can cause a wiper motor to fail, including age, wear and tear, damage to the motor or linkage, and electrical problems such as a blown fuse or faulty wiring. If your wiper motor is not working, it’s important to have it diagnosed and repaired by a professional mechanic or technician.
Can I replace my 3 wire wiper motor with a different type of motor?
It may be possible to replace your 3 wire wiper motor with a different type of motor, but this will depend on the specific make and model of your vehicle and the type of wiper system it uses. It’s best to consult with a professional mechanic or technician before making any modifications to your vehicle’s wiper system.
