How to Repair a Windshield Wiper Motor?

How to Repair a Windshield Wiper Motor?

Wiper Motor

Windshield wipers are one of the most important aspects of your vehicle’s safety so it’s important that you repair them as soon as you notice a problem. In some cases, it might be as simple as replacing the wiper blades but there are rare instances when you might have to learn how to repair a windshield wiper motor.

What Exactly Does the Wiper Motor Do?

Windshield wiper motor working process

The wiper motor pulls on the linkage that connects to the wiper arms, swiping them across the windshield. If you do find that you have to replace the motor, then you should check all components of your windshield. Furthermore, you should lubricate all facets of the wiper system.

In short, windshield wiper motor replacement consists of the following:

  • Inspection
  • Testing the Fuse
  • Removal of the Wiper Motor
  • Installation of a New Wiper Motor
  • Testing

Although you can replace the motor yourself, you need a second person fto help you with the testing phase.

Determine if the Wiper Motor Needs to be Replaced

Windshield Wiper Motor

Here are some common indications that you need to replace your windshield wiper motor.

  • Wipers do not move or are very slow.
  • Wipers cannot be turned off.
  • Wiper speed cannot be changed.
  • Wipers do not stop in the correct position.

Note: All of these issues could also be caused by faulty linkage, which is why you should check the entire wiper system.

steps involved

Although it’s generally better to have a professional perform this complicated task, it is possible to repair your wiper motor at home. Here are the steps involved. Since all vehicles are different, I will provide you with the basics. Refer to your owner’s manual for specific details.

Test the Fuse

Before taking it all apart, start with the simplest test – the fuse. Find the fuse that powers your windshield wiper system, remove it and see if it’s faulty. If the fuse is faulty, then change it and test the wipers again. Do they work? Great! As long as the fuse does not blow again, then there is no need to repair the wiper motor.

However, if the fuse was not the problem then you’ll have to pull apart the wiper system. Start with the arms and work your way down to the motor.

See our blog – How To DIY Repair Or Replace A Windshield Wiper Arm

Removing the Motor

Disconnect the battery terminals. Now unplug all of the electrical connections and consider labeling the connections so that you know how to put them back together later. Then remove the bolts that attach the motor to the vehicle. Gently remove the motor. Depending on the model of your vehicle, you can sometimes pull the linkage out with the motor.

Install the New Motor

If you pulled the linkage out with the motor, then you will need to attach it to the new motor. Make sure that you reattach the electrical connections to the new motor. Now install the motor. Work your way up and reattach the linkage and arms. Reattach the battery terminals.

Test the New Motor

Have another person turn on the motor. Do your wipers work? Great! If not, then you either didn’t connect something correctly or there is a problem with the electrical wiring. In that case, you will have to take your vehicle to a professional.

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