How to Replace an Intermittent Wiper Relay

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Intermittent wipers are a great feature for those times that it isn’t raining hard enough to have the wipers going at low speed. The intermittent wiper relay gives you this feature. The relay functions as a switch and energizes circuits as needed. In the case of your windshield wipers, it controls low, high, and intermittent speeds by energizing a particular circuit at a given moment depending on what speed you have your wiper switch set to.

As with any electronic component, it can fail completely or only on one circuit. Your wiper relay could be bad if the low and high speed wiper positions function properly but the intermittent function stops working. Any combination of positions working or not working is a good indication of a faulty relay.

Part 1 of 1: Replacing your intermittent wiper relay

Materials Needed

  • Owner's manual
  • Screwdriver - flathead/Phillips

typical underhood relay location

Step 1: Locate your relay. Many late model vehicles can have multiple locations for fuses and relays.

There can be underhood as well as interior locations. Your owner's manual is a good source for locations and diagrams. Frequently the lid for the fuse/relay box will have diagrams as well.

  • Note: If your car is a little older, it may only have a fuse box located under either the driver’s or passenger side dash with relays mounted in or near it. In these cars, relays are frequently mounted separate from the fuse box, usually under dash near the steering column.

common under dash relay location

Step 2: Remove the relay. With the ignition in the off position, remove the relay.

They can sometimes feel a bit tight and require a little force to pull them out. If you can’t pull it out by hand, gently pry it up with an appropriately sized screwdriver.

Step 2: Install the new relay. Compare the bad relay with the new one.

The labels may be different but make certain the number and position of the plugs are correct. Before you put things back together, switch the key on to verify the new relay is functioning properly. Once verified, switch the key off and button things up.

If you need an intermittent wiper relay replacement and you are not completely confident in making the repair, have one of YourMechanic’s certified technicians come to your home or work and perform the replacement for you.


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Recent Intermittent Wiper Relay Replacement reviews

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YourMechanic Intermittent Wiper Relay Replacement Service

Average Rating

4.9/5

Number of Reviews

122,245

Rating Summary
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114,000
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Chris

13 years of experience
312 reviews
Chris
13 years of experience
Dodge Avenger - Thermostat - San Diego, California
Chriss takes the time to figure out exactly what is wrong and goes above and beyond on ensuring you know what the problem is and what he will do to fix it as well as any recommendations for future things that will need to be serviced. He is extremely kind and humble.
Jeep Wrangler - Oil Change - San Diego, California
Was very attentive, quick, and efficient. Look forward to booking with him again.

Joshua

25 years of experience
709 reviews
Joshua
25 years of experience
Chrysler Town & Country - Car is not starting - San Pablo, California
Couldnt ask for a better mechanic
Mercedes-Benz C230 - AC Compressor - Danville, California
It's rate to meet a gifted person who loves what s/he is doing. Joshua is one of those exceptional people. He's highly skilled but also enjoys what he's doing. He's also a very authentic, hard-working person with high integrity. My car and I feel very fortunate and grateful meeting Joshua.

Luis

10 years of experience
69 reviews
Luis
10 years of experience
Toyota Sequoia - Intermittent Wiper Relay Replacement - Albuquerque, New Mexico
Luis was early for the appointment and seemed to be very knowledgeable about the work that needed to be done. He located the part for a lot less than the dealer wanted. He took his time to explain the work needed and he was courteous and friendly.

David

11 years of experience
253 reviews
David
11 years of experience
Lexus IS250 - Intermittent Wiper Relay - Acworth, Georgia
This was my first time using Your Mechanic and I am very impressed. David did an awesome job. Very professional, very knowledgeable and gave me an education on what was happening with the car and how he fixed it. I will definitely be using this service going forward for routine maintenance and repairs where possible. Thx again David! Ted G Acworth, GA

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