Mercury Mountaineer Windshield Wipers Aren't Working

Common Causes of Non-Functioning Windshield Wipers on Your Mercury Mountaineer and How to Fix Them

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Reviewed by
Devin Cabugcal
Written by RepairPal Car Genius
Updated January 14, 2025
0%
75% chance it's the
Wiper Motor
0%
25% chance it's the
Switch
The most common reasons a Mercury Mountaineer windshield wipers aren't working are broken wiper motor and issues with the switch.
  • Wiper Motor: A faulty wiper motor or a bad electrical connection can result in intermittent or non-functioning windshield wipers.
  • Switch: A faulty switch can result in intermittent or complete failure of the electrical component it controls, leading to malfunctioning systems.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

How much does it cost to fix a Mercury Mountaineer windshield wipers aren't working?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

Inability to control the windshield wipers comes in several forms, and they are all indicative of windshield wiper switch failure. The windshield wipers may not work in all settings, may not turn on when requested, may not move to their parked position when turning off, or the washer pumps may or may not run at random. This is a general list of symptoms, but failure of anything the windshield wiper switch controls will indicate the need for testing the windshield wiper and washer switch.

A failed windshield wiper motor will do one of two things in the event of failure. First, it can intermittently work, meaning when the wiper switch is turned on, the windshield wipers may activate, and run for a random amount of time. This may happen at random, or change with a bump. Lastly, the windshield wipers could show no signs of activity, indicating motor failure.

The moment water touches the windshield, you know if you need new windshield wiper blades. If your wiper blades are torn, cracked, hard, or brittle, it is time for replacement. Wipers should also be replaced if the wiper blades only smear water around, seem to make a mess, streak the windshield, and miss large patches. If you are unhappy with the current wiper blades on your vehicle, this is a very economical change to make.

Windshield wiper arms will be replaced mainly for aesthetic reasons or damage. If the windshield arms become bent or rusted, the windshield wipers may not contact the windshield at the proper angle, or there may be no contact at all. Also, the sun will take a toll on these parts after years of use, and fading or clear coat peeling will result, not to mention rust.

Troubleshooting Non-Functional Windshield Wipers in a Mercury Mountaineer

When troubleshooting non-functional windshield wipers in a Mercury Mountaineer, it's essential to adopt a methodical diagnostic approach. Start by inspecting the wiper blades for any visible damage, such as tears or wear, as these can significantly affect performance. Next, check if the wipers are frozen to the windshield, especially in cold weather, which can lead to mechanical failures if the wipers are forced to operate. If the blades appear intact and are not frozen, listen for the sound of the wiper motor when you activate the wipers; a lack of sound may indicate a motor failure. Additionally, test the washer pump motor by activating the windshield washer; if you hear no noise, the pump may need replacement. Pay attention to any unusual symptoms, such as inconsistent wiper speeds or strange noises, as these can provide clues about underlying issues. By following this structured approach, you can effectively diagnose and address the problems with your windshield wipers, ensuring they function properly when you need them most.

What to Check When Windshield Wipers Aren't Working on a Mercury Mountaineer?

When dealing with non-functioning windshield wipers on a Mercury Mountaineer, it's essential to understand the common problems that could be at play. One of the first things to check is whether the rubber edges of the wipers are frozen to the windshield, especially during winter months. This can cause significant damage to the wiper system if the wipers are activated while stuck. Additionally, inspect the washer fluid system for clogs or malfunctions, as a lack of fluid can hinder wiper performance. Mechanical failures, such as issues with the wiper motor or switch, are also common culprits that can prevent wipers from operating correctly. Fortunately, most of these problems are straightforward to diagnose and can often be fixed with minimal expense, making it feasible for DIYers to tackle these repairs themselves. By systematically checking these areas, you can effectively troubleshoot and restore your windshield wipers to proper working order.

Why Are the Windshield Wipers Not Working on a Mercury Mountaineer?

When windshield wipers on a Mercury Mountaineer fail to operate properly, it is crucial to address the issue promptly to avoid serious safety risks. Wipers that only function on high speed or not at all can severely impair visibility during rain, snow, or sleet, increasing the likelihood of accidents. Additionally, if only one wiper is operational, it may indicate underlying mechanical problems that could worsen over time, leading to more extensive and costly repairs. Torn wiper blades, a common yet easily overlooked issue, can prevent effective moisture clearance, further compromising safety. Ignoring these symptoms not only risks your safety but can also lead to damage to the windshield or other components of the wiper system. Therefore, diagnosing and resolving the specific malfunction—whether it be a faulty motor, switch, or even the wiper arms—is essential for maintaining both the functionality of your vehicle and the safety of its occupants.

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