How to Turn On Automatic (Rain-Sensing) Wipers

In most cars, automatic wipers are activated by moving the wiper stalk to an “AUTO” or “A” position (often marked with a rain-drop icon) and, if available, adjusting a sensitivity ring on the stalk; some vehicles also require enabling the feature in an on-screen settings menu. These systems use a windshield-mounted sensor to detect moisture and vary wipe speed automatically, but the exact control method can differ by brand and model—so knowing where to find the Auto position, how to tweak sensitivity, and when to fall back to manual wiping is key.

What Automatic Wipers Are—and How They Work

Automatic, or rain-sensing, wipers rely on an optical sensor bonded to the inside of the windshield, typically behind or near the rearview mirror. When moisture refracts light at the sensor, the system commands the wipers to sweep and adjusts speed based on intensity. Most cars pair this with a sensitivity control, and many also offer linked features like automatic headlights when the wipers are on.

Quick Steps (Most Cars)

The following step-by-step outline covers the most common way to switch on automatic wipers and adjust them for your conditions. It applies broadly across mainstream models, though exact labels and positions can vary.

1. Locate the wiper stalk on the steering column (usually right side in North America, sometimes left in European brands).
2. Rotate or move the stalk to the “AUTO,” “A,” or rain-drop icon position (this replaces traditional intermittent settings).
3. Adjust the sensitivity using the small slider or ring on the stalk—higher sensitivity starts wiping sooner and more frequently.
4. If your car has a touchscreen or instrument-cluster menu, confirm “Rain-Sensing Wipers” or “Auto Wipers” is enabled (often under Vehicle or Wipers settings).
5. Test by spraying windshield washer fluid; the wipers should respond automatically when Auto is active.
6. For heavy rain, snow, or slush, switch to a manual low/high setting if the system isn’t clearing the windshield quickly enough.

Once set, most systems “remember” the Auto mode for the next drive. If not, you’ll need to reselect Auto each time. Always override with manual speeds whenever visibility demands it.

Brand-by-Brand Notes

Controls and menus differ slightly across manufacturers. These quick notes highlight where to look and what to expect on popular brands.

• Toyota/Lexus: Stalk has an “AUTO” or rain icon; sensitivity ring on the stalk. Some models include a toggle in Vehicle Settings for Rain-Sensing Wipers.
• Honda/Acura: Use the AUTO or “A” position on the stalk; adjust the ring for sensitivity. Certain trims offer a settings toggle under Vehicle > Wipers/Lighting.
• Ford/Lincoln: Enable Rain-Sensing Wipers in Settings (SYNC or cluster), then set the stalk to Auto/INT. Use the ring to set sensitivity.
• Chevrolet/GMC/Buick/Cadillac: Turn on in the Vehicle/Wipers menu if available, then select Auto/INT on the stalk and adjust the ring.
• Volkswagen/Audi: Stalk labeled “AUTO”; adjust the thumbwheel. MMI/infotainment may offer a Rain Sensor sensitivity option.
• BMW/MINI: Press the button on the end of the stalk with the “A” over a wiper icon; a green light confirms Auto. Use the rocker/slider for sensitivity.
• Mercedes-Benz: Set the stalk to position I (Auto) and adjust sensitivity on the stalk slider; some models include a menu toggle under Assistance or Vehicle.
• Hyundai/Kia/Genesis: Stalk has an AUTO position; sensitivity via ring. A settings toggle may appear under Vehicle > Wipers.
• Subaru: AUTO on the stalk with sensitivity ring; many models also offer a Wiper-Linked Headlights option in settings.
• Mazda: Select AUTO on the stalk; adjust the ring. Rain-Sensing Wipers can often be toggled in Mazda Connect settings.
• Nissan/Infiniti: Use the AUTO position and adjust the ring; some models include a settings toggle in the cluster or infotainment.
• Volvo: Press the rain-button on the stalk to enable Auto (indicator lights up), then turn the ring for sensitivity.
• Jaguar/Land Rover: Choose AUTO on the stalk; sensitivity via ring, with optional menu toggle under Vehicle settings.
• Tesla: Tap Controls > Wipers on the touchscreen and choose Auto (often Auto 1/Auto 2), or press the left-stalk button (3/Y) for a single wipe to bring up the wiper card, then select Auto.

If your vehicle doesn’t show an AUTO position or a menu toggle, it may not be equipped with rain-sensing wipers, or the feature may be bundled on higher trims or packages.

If Auto Doesn’t Work

Automatic wipers can be finicky when sensors are obstructed, settings are off, or the windshield has coatings that confuse detection. Use these checks to restore proper function.

• Verify your car actually has rain-sensing wipers (look for an AUTO/A label on the stalk or a rain sensor module near the mirror).
• Confirm the feature is enabled in the vehicle settings, then reselect Auto on the stalk.
• Clean the windshield, especially the area in front of the sensor; remove fog/condensation with defrost.
• Avoid heavy wax or hydrophobic coatings directly over the sensor area; they can reduce detection accuracy.
• Replace worn blades—streaking can degrade sensor performance and visibility.
• If the windshield was recently replaced, the sensor may need to be correctly re-bonded or calibrated.
• Restart the vehicle and infotainment if the touchscreen toggle seems unresponsive.
• Consult the owner’s manual for model-specific steps; if issues persist, have a dealer inspect the sensor and related settings.

These steps resolve most issues; persistent faults typically point to a misaligned sensor, incorrect bonding after glass replacement, or a software/firmware setting.

Safety and Best Practices

Rain-sensing wipers are helpful, but they don’t replace driver judgment. Keep these practices in mind for clear visibility.

• Switch to manual low/high speed during heavy rain, snow, or slush if Auto isn’t keeping up.
• Turn wipers off (not Auto) in car washes and when scraping ice to prevent damage.
• Use defrost/defog to clear condensation; fog can mislead the sensor.
• Replace blades at least annually (more often in harsh climates) and keep the windshield clean.
• Know that light mist, spray, or insects may not always trigger Auto—manually wipe as needed.
• If equipped, enable wiper-linked headlights for better visibility and compliance with local laws.

Thoughtful use of Auto mode maximizes convenience without compromising situational awareness or safety.

Frequently Asked Clarifications

Drivers often have similar questions when first using automatic wipers. Here are quick answers to the most common points.

• What does the “A” or rain icon mean? It indicates the automatic/intermittent sensor-controlled mode.
• What does the sensitivity ring do? It changes how readily the system starts and how frequently it wipes.
• Can I leave Auto on all the time? Usually yes, but turn it off in car washes or when working around the windshield.
• Will the wipers run on a dry windshield? Good systems avoid dry wipes, but glare, dirt, or coatings can cause occasional false wipes.
• Do automatic wipers work with snow/ice? They detect moisture, but manual control is often better in winter conditions.

Understanding these behaviors helps set realistic expectations and reduces frustration with edge cases.

Summary

To turn on automatic wipers, set the wiper stalk to the AUTO/A or rain icon position, adjust the sensitivity ring if present, and confirm any on-screen Rain-Sensing Wiper setting is enabled. Clean glass and healthy blades are essential, and manual modes remain the safest fallback in heavy or wintry conditions. If the feature doesn’t respond, check settings, clean the sensor area, and verify proper windshield/sensor installation.

How do automatic windshield wipers know when to turn on?

Under dry conditions. This light reflects internally. And bounces back into a detector in the sensor.

Why won’t my rain-sensing wipers work?

If your rain sensing wipers aren’t working, first check that the system is activated and the lever is in the correct AUTO position. Next, inspect the rain sensor area on the windshield, ensuring it’s clean, clear of debris, and properly seated without gaps or damage to the gel pad underneath. If the issue persists, test the sensitivity settings and try cleaning the sensor. If these steps don’t work, the sensor may be faulty and require recalibration, replacement, or a professional inspection of electrical connections, according to this Reddit thread.
 
Troubleshooting Steps

1. Activate the system: Ensure the auto-wiper lever is in the “AUTO” position, not “OFF” or a fixed speed setting. 
2. Clean the sensor area: Gently wipe the sensor’s lens and the surrounding windshield area with a soft, clean cloth and water to remove dirt, ice, or condensation that can interfere with the sensor’s readings. 
3. Check for physical damage: Look for any cracks or gaps between the sensor and the windshield. 
4. Check for proper seating: Make sure the sensor is firmly pressed against the glass, often requiring the gel pad to be flush with the windshield. 
5. Adjust sensitivity: If your vehicle has a sensitivity dial or setting, try adjusting it to a higher or lower setting to see if it resolves the issue. 
6. Perform a basic test: You can test the system by splashing water on the windshield to see if the wipers activate. 

When to seek professional help

• Post-windshield replacement: Opens in new tabIf the wipers stopped working after a windshield replacement, the sensor was likely not installed correctly with a new gel pad, according to this YouTube video. 
• Electrical issues: Opens in new tabA professional can check for damaged wiring, corroded electrical connections, a faulty wiper control module, or a blown fuse. 
• Sensor malfunction: Opens in new tabIf the sensor itself is failing, it may need to be recalibrated or replaced. 

This video explains how to clean the rain sensor lens and the gel pad: 1msmart carsYouTube · Jan 2, 2016
Where to find the rain sensor
The rain sensor is typically located behind the rearview mirror, in a small housing on the windshield.

How do I turn on an automatic wiper?

Down one stop below the off position to engage automatic rain sensing mode. The wiper speed will vary depending on the amount of moisture detected on the windshield.

Why isn’t my window wipers working on my auto?

If you notice your windscreen wiper not working, check the relevant fuse. You can find more information in your vehicle handbook. Failed motor – Your wiper arms are powered by small motors which can sometimes fail with age. If you’ve checked your fuse, and the arms are still not moving, your issue may be your motors.