(Fix) Rain Sensing Wipers Not Working After Windshield Replacement
Customer Complaint:
This 2017 Ford Expedition came in with a problem of the windshield wipers not working on the “rain sensing” mode.
But, the windshield wipers will function in the normal setting.
This problem occurred after a new windshield was installed by another company.
First Thoughts:
The rain-sensing wipers detect moisture on the windshield and wipe it away automatically.
It does this by using a small sensor in the windshield.
Since this problem started after a windshield was replaced, it’s possible that the sensor got damaged.
Diagnostics:
My first step with this vehicle is to scan it for codes.
This can give me a direction to the problem.
Except, there are no trouble codes for the rain sensor.
The next step is to do a visual inspection.
I need to make sure that the sensor did not get damaged when the windshield was replaced.
Rain sensor cover
The rain sensor is located beside the rearview mirror, under this cover.
To remove it, all you need to do is carefully pull it.
Ford Rain Sensor
Looking at the back of the rain sensor, it looks fine.
It is in place and plugged in. What could be the problem?
It’s not until I remove the rain sensor that is reveals the problem.
The rain sensor has been damaged and is dirty.
The picture below is the old one compared to the new one.
The problem is that the sensor was damaged when the windshield was installed.
When you read service information about installing one of these sensors, it explains that if the sensor is damaged or contaminated, it needs to be replaced.
When I installed the new one, the rain sensing wipers worked.
Fixed!
Frequently Asked Question:
Where do I find wiring diagrams and step-by-step repair procedures for Fords?
The best online resource I use is Alldatadiy.com.
I used it for this case study to find the correct procedure for this 2017 Ford Expedition.
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