When it comes to wiring diagrams for vehicles, one of the most commonly searched keywords is “1987 chevy truck wiper motor wiring diagram”. This is because the 1987 Chevy Truck is a popular vintage car that is still driven today. The wiper motor is an important component of the vehicle’s wiper system, and having a proper wiring diagram can help in troubleshooting any related issues.
Introduction to 1987 Chevy Truck Wiper Motor Wiring Diagram
In this article, we will provide an in-depth guide to the 1987 Chevy Truck Wiper Motor Wiring Diagram. We will start by discussing the wiper motor’s role in the vehicle’s system and the basic wiring scheme. We will then delve into the wiring diagram, discussing each wire and its function. Lastly, we will provide some frequently asked questions about the 1987 Chevy Truck Wiper Motor Wiring Diagram.
The Role of the Wiper Motor
Before delving into the wiring diagram, it’s essential to understand the role of the wiper motor. The wiper motor is an essential component of the wiper system, and it is responsible for controlling the wiper blades’ movement. The motor is activated when the driver turns the wiper switch, and it moves the wiper arms back and forth on the windshield to clear the water or debris.
The Basic Wiring Scheme
The wiring diagram for the 1987 Chevy Truck Wiper Motor consists of several wires that control its function. The wiper motor has two electrical connections, namely the ground wire and the power wire. The power wire is connected to a fuse, which is typically located in the fuse box. The ground wire, on the other hand, is connected to the vehicle’s chassis.
There are also two wires that control the wiper motor’s speed, namely the high-speed wire and the low-speed wire. These wires are connected to the wiper switch, which allows the driver to adjust the speed of the wiper blades. Lastly, the park wire regulates the wiper blades’ resting position when they are turned off.
The Wiring Diagram
Now that we’ve discussed the basics let’s delve into the wiring diagram. The diagram provides a detailed illustration of the wiper motor and its wiring. Here is a detailed breakdown of each wire:
| Wire | Color | Function |
|---|---|---|
| G | Black | Ground Wire |
| W/L | White/Light Blue | Low-Speed Wire |
| W/H | White/Dark Blue | High-Speed Wire |
| P | Light Green | Park Wire |
| B | Black | Power Wire |
Ground Wire (G)
The Ground Wire (G) is a black-colored wire that is connected to the wiper motor’s metal casing. It provides a direct connection to the vehicle’s chassis and helps in completing the electrical circuit. Without the ground wire, the wiper motor won’t function correctly.
Low-Speed Wire (W/L)
The Low-Speed Wire (W/L) is a white and light blue-colored wire that is connected to the wiper switch’s low-speed terminal. When the driver turns the wiper switch to the low-speed setting, the W/L wire sends a low-voltage signal to the wiper motor, which runs at a slower speed.
High-Speed Wire (W/H)
The High-Speed Wire (W/H) is a white and dark blue-colored wire that is connected to the wiper switch’s high-speed terminal. When the driver turns the wiper switch to the high-speed setting, the W/H wire sends a higher voltage signal to the wiper motor, which runs at a faster speed.
Park Wire (P)
The Park Wire (P) is a light green-colored wire that controls the wiper blades’ resting position. When the driver turns off the wiper switch, the P wire sends a signal to the wiper motor, which returns the blades to their resting position at the bottom of the windshield.
Power Wire (B)
The Power Wire (B) is a black-colored wire that is connected to the vehicle’s fuse box. It provides a 12-volt power supply to the wiper motor, allowing it to function. The B wire is typically connected to a 20-amp fuse, which protects the wiper motor from any electrical surges.
Frequently Asked Questions (FAQ)
1. How do I know if my wiper motor is faulty?
If your wiper blades don’t move or move at an incorrect speed, your wiper motor might be faulty. You can perform a few checks, such as checking the wiper fuse, wiper switch, and wiring connections. If these components are functioning correctly, you might need to replace the wiper motor.
2. How do I test my wiper motor?
You can test your wiper motor by disconnecting the wiring connections and using a multimeter to check for continuity. You can also check the motor’s resistance, as indicated in the car’s service manual. If the motor fails these tests, it might be time to replace it.
3. Can I replace my wiper motor myself?
Replacing a wiper motor typically requires some mechanical experience and knowledge of electrical systems. If you are comfortable working with electrical systems, you can replace your wiper motor yourself. However, if you are not confident, it’s best to seek the help of a professional mechanic.
4. How do I find the correct wiper motor for my 1987 Chevy Truck?
You can find the correct wiper motor for your 1987 Chevy Truck by checking the service manual or consulting with a mechanic. You can also search for the motor online by using the car’s make, model, and year to find a compatible replacement.
5. How often should I replace my wiper motor?
Wiper motors typically last for several years, but their lifespan can vary depending on usage and maintenance. It’s best to replace your wiper motor if you notice any signs of malfunction, such as slow or erratic movement or complete failure to move.
Overall, understanding the 1987 Chevy Truck Wiper Motor Wiring Diagram can help you troubleshoot any issues with your vehicle’s wiper system. By following the wiring diagram and performing some basic checks, you can maintain your wiper motor’s proper function and ensure clear visibility while driving.
