Windshield wiper motor issues can stem from various causes, ranging from mechanical and electrical problems to malfunctions in the wiper switch. These problems can manifest in different ways, affecting the entire wiper system.

Accurately diagnosing these faults ensures your wipers are always in working order. This article will cover the possible causes of windshield wiper motor failure and provide solutions. Let’s get into it!

What’s a Windshield Wiper Motor?

The wiper motor is an essential component of any vehicle’s windshield wiper system. It provides the power and movement necessary to clear the windshield of rain, snow, and other debris.

The motor is behind the dashboard and connected to the wiper linkages via gears and arms. When activated, the motor spins and drives the wiper linkages, causing the wipers to move across the windshield.

Causes of Windshield Wiper Motor Failure

1. Electrical Faults

Electrical faults commonly cause windshield wiper motor problems. They range from simple issues like frayed wires or loose connectors to complex problems like faulty relays or blown fuses.

Sometimes, the wiper switch or motor control module might be defective. Each wiper motor wiring system component ensures the motor receives power and operates correctly.

When any of these components fail, it can disrupt the power supply to the motor, leading to a malfunctioning wiper system.

2. Clogging

The windshield wiper motor is designed to function effectively as a well-sealed unit over extended periods.

However, dirt and debris can still infiltrate the motor assembly or gearbox even with this protection. Over time, this buildup can hinder the motor’s performance, causing it to operate sluggishly or even fail prematurely.

The accumulated dirt can create friction and increase the workload on the motor components, leading to accelerated wear and reduced lifespan. Regular cleaning and maintenance of the wiper motor assembly can prevent clogging and ensure optimal performance.

3. Parts Wear

Parts wear is a primary culprit, leading to noise, rough rotation, and motor failure. Over time, the moving components within the motor assembly, such as gears and brushes, experience wear and tear.

This can decrease performance, increase noise, and even complete failure. In such cases, replacing the entire motor assembly is often the most practical solution. 

However, rebuilding the motor by replacing worn parts like gears or brushes might be viable for those with mechanical expertise. It’s important to note that rebuilding can be time-consuming and requires specialised knowledge.

Ultimately, the best course of action depends on the extent of the damage, the individual’s mechanical skills, and the overall cost-benefit analysis.

4. Breakage

In addition to the wear and tear occurring over time, wiper motor parts can experience unexpected breakage.

This often happens with plastic components like gears, which can damage or fracture due to excessive force, extreme temperatures, or manufacturing defects.

When a gear or other essential part breaks, it can disrupt the wiper motor’s mechanical function, leading to intermittent operation or complete failure. 

While some smaller parts might be replaceable, a significant breakage often necessitates replacing the entire wiper motor unit.

This is because the motor’s internal components are typically integrated and challenging to repair individually.

Remedy for Windshield Wiper Motor Failure

Windshield wiper issues can be quite frustrating, especially when you’re caught in rain or snow with low visibility and no reliable way to clear your windshield.

To avoid these dangerous situations, it’s important to have your vehicle’s wiper motor checked and serviced by skilled auto technicians.

Regular maintenance ensures that your wipers are in top shape, allowing for safe driving in all weather conditions.
Having your wiper motor inspected and repaired promptly will keep your car roadworthy and ready for whatever the UK weather throws your way. Don’t wait until you’re stuck in a storm—schedule a check-up and keep your vehicle in optimal condition.