Reasons Why Car Wipers Cannot Swing

[DeAlexis]

Wipers not moving is due to the motor's connector not being properly attached. Below is relevant information about wipers: 1. Operating Principle: The power source of the wiper comes from the motor, which is the core of the entire wiper system. The quality requirements for the wiper motor are quite high. It uses a DC permanent magnet motor, and the wiper motor installed on the front windshield is generally integrated with the worm gear mechanical part. The function of the worm gear mechanism is to reduce speed and increase torque. Its output shaft drives the four-bar linkage mechanism, which converts continuous rotational motion into a left-right swinging motion. 2. Basic Introduction: It refers to the blade structure installed in front of the windshield, consisting of the motor, reducer, four-bar linkage mechanism, wiper arm spindle, and wiper blade assembly. Its main function is to remove rain, snow, and dust that obstruct the view on the windshield.

[HarmonyLee]

Last time I fixed my wipers myself, I found that if they don't move, it's usually because the motor is burnt out or the linkage has come loose. When you turn on the switch and hear the motor humming but the wipers don't move, it's mostly because the metal rod in the transmission mechanism has come loose. You'll need to remove the black plastic cover under the hood to check. If there's no sound at all, first check the manual to locate the fuse box—a thumb-sized transparent fuse might have blown, causing the wipers to stop working. Last winter, I encountered this issue when the wiper shaft froze, causing the motor to burn out. Now, I always remember to spray anti-freeze lubricant before winter. Also, it's quite common for leaves to pile up under the wipers and jam the rotating shaft, so remember to clean the drainage channel when washing the car.

[JamesAnn]

As a female driver who frequently takes long trips, I'm particularly afraid of wiper failure. Besides the commonly mentioned fuse and motor issues, I must remind my fellow sisters to pay attention to the wiper arm nut hidden under the hood. Once during heavy rain, my wiper suddenly got stuck, and it turned out the nut had loosened, causing the entire wiper arm to slip. Another possibility is poor contact in the control switch. For example, the combo switch in my car had been used for seven years, and the spring plate was completely worn out. The most troublesome situation is when the car's computer crashes, causing the wiper program to malfunction. In this case, you need to disconnect the negative battery terminal and wait ten minutes to reboot. I recommend always keeping spare fuses and a simple tool kit in your car.

[DelFinn]

Old Zhou, who has been repairing cars for twenty years, told me that when the wipers stop working, check three things first: listen for the motor sound, check the fuse, and wiggle the wiper arm. Broken motor belts are rare in new cars, but older cars need special attention. Use needle-nose pliers to pull out the fuse and check it against the light—the melted metal wire is obvious. If the wiper arm feels loose, it's likely the transmission ball joint has come off. Snow and rain make the pivot shaft prone to rusting—WD-40 sprayed on the shaft can be a quick fix. Last month, their shop fixed a Tesla whose wipers went dormant due to a system update—this kind of issue requires a visit to the 4S shop for a software reset.

[EleanorAnn]

Nowadays, more and more cars come with automatic rain-sensing wipers. Malfunctions may occur if the rain sensor above the windshield is covered by a film—my colleague's Mercedes-Benz fell victim to this issue. For traditional wipers, the focus should be on inspecting the motor gearbox, as worn worm gears inside can cause idle spinning. During my last maintenance check, I found the wiper linkage rod on my car rusted through, with metal shavings jamming the gears and causing a lock-up—replacing the kit only cost 300 bucks. Another easily overlooked issue is when high-pressure car wash jets bend the wiper arm, leading to jerky movements. It's recommended to apply some white high-temperature grease to the pivot every six months, as it withstands heat better than regular grease.

[OAshley]

Young people, be cautious when modifying your cars! My brother's Fit had wiper failure, which turned out to be caused by installing oversized wipers that overloaded the motor. The stock motor is typically designed to handle 26-inch blades, but he forcefully upgraded to 28-inch ones. Also, water ingress causing short circuits is extremely dangerous—once, he damaged the wiring harness connector by using a high-pressure washer during a DIY car wash, resulting in complete loss of visibility during rain. And for those who spray red antifreeze on their wipers, the rubber blades can swell and significantly increase resistance. Regularly replacing the rubber blades is crucial, as aged rubber can triple the motor's workload. Finally, remember that when the windshield has heavy oil buildup, the wipers will struggle like they're pushing a shot put.