Why does the rear wiper keep moving and cannot be turned off?

[HoldenLee]

The rear wiper keeps moving and cannot be turned off because the rear wiper switch was accidentally pressed. Simply pull it back to resolve the issue. Below is some information about wipers: Alternate Names and Functions: Wipers are also known as windshield wipers, water wipers, or rain wipers. They are devices used to wipe away raindrops and dust attached to the vehicle's windshield, improving the driver's visibility and enhancing driving safety. Scope of Application: Due to legal requirements, almost all cars worldwide are equipped with wipers. Rear windows of vehicles such as hatchbacks and SUVs also have wipers. In addition to cars, other means of transportation, such as trains and trams, are also equipped with wipers. Some engineering machinery, such as cranes, also have wipers installed.

[DelNorah]

I previously helped a friend deal with a similar issue at the repair shop. The rear wiper wouldn't turn off and kept moving, most likely due to a stuck switch—either the contacts inside the control lever were worn out or the spring failed, leaving it stuck in the 'on' position. Another possibility is that the relay contacts were fused due to burning—the relay is a small device that controls the current, and if it's stuck, the current keeps flowing, causing the wiper to operate continuously. Also, check for any short circuits in the wiring, such as exposed wires touching metal, which could allow current to flow. I recommend trying to toggle the switch multiple times to reset it. If that doesn’t work, open the fuse box and locate the rear wiper fuse to inspect it. Meanwhile, driving in the rain with the wiper constantly moving is both distracting and drains the battery, so it's safer to visit a professional repair shop early to replace the faulty parts. Also, remember to test your wipers occasionally during regular driving to avoid sudden malfunctions—this can enhance your peace of mind while driving.

[MichaelRose]

As an ordinary car owner, I've experienced the rear wiper failing to turn off twice, mostly due to the control lever not returning to the correct position or the relay getting stuck. Over time, rust on the control lever contacts can cause it to jam, and when the relay, acting like a small switch, gets stuck, the wiper won't stop; water ingress causing a short circuit in the wiring is also possible, especially during rainy seasons when wet wires are prone to failure. I've tried turning off the car and restarting to reset the system, and if that doesn't work, checking the fuse box and temporarily removing the wiper fuse to stop it. Once it happened on the highway, and I used a towel to temporarily cover the rear window to avoid distraction. It's quite annoying, so don't take it lightly. Prolonged issues can easily burn out the wiper motor, so find a place to fix it promptly to ensure safe driving, and regularly clean dust from the wiper joints to prevent jamming.

[AddysonLynn]

From a circuit perspective, the rear wiper not turning off and continuously moving is usually due to the control signal not being disconnected. Common causes include switch contact adhesion or relay contact burning and sticking, where sparks during opening and closing cause sticking and continuous current flow; electronic control module failures such as software bugs can also maintain power supply; short circuits, such as motor terminals touching metal and directly receiving power. During testing, use simple tools like moving the switch to feel resistance, ideally using a multimeter to measure the switch terminal status. The solution requires replacing related components such as the switch or relay. For safety, disconnect the battery's negative terminal to temporarily stop operation, which can prevent accidents. When maintaining the wiper system, pay attention to dust and moisture protection.

[Leo]

Driving safety comes first. A rear wiper that won't turn off can be dangerously distracting, especially in heavy rain or slippery conditions. The main causes include switch failure or electrical short circuits causing continuous current. If this happens, immediately pull over to a safe spot and try turning off the switch or removing the fuse to stop it; check the wiper fuse location in the fuse box and perform a simple system reset. If that doesn't work, don't force driving—continuous wiper movement affects visibility and drains the battery, so towing it to a professional repair shop is key. Develop a habit of regular checks while driving to avoid issues with aging components like switches or relays. Proper maintenance of the wiper system reduces unexpected problems.

[KatherineLee]

Preventive maintenance is crucial to avoid the malfunction of the rear wiper not turning off. The main causes are switch wear or relay burn-out sticking, which keeps the circuit continuously powered; dust accumulation in the wiper arm joint can also easily cause jamming and prevent it from turning off. Regularly test the switch response and clean the wiper arm every six months, and check the overall position when replacing the wiper blade. If problems arise, don't ignore them—early repairs can prevent further damage, such as motor overload and burn-out during rainy days. Long-term maintenance can extend component lifespan and ensure driving safety, especially in cold regions where the system's integrity is critical during freezing periods. A quick wiper test before driving provides extra peace of mind.