What is the reason for one wiper working while the other does not?

[AllisonFitz]

Introduction to the reasons why one wiper works while the other does not: 1. The wiper fuse is blown; 2. The wiper motor is burnt out; 3. The wiper switch is faulty, etc. You can go to a nearby repair shop for a detailed inspection to identify and fix the issue. Below is some related information about wipers: 1. Classification of wipers: Wipers can be categorized by their driving methods into mechanical, vacuum, pneumatic, hydraulic, and electric types. Modern cars generally use electric wipers due to their simple structure and convenient control. Typically, a car wiper consists of a motor, crank, linkage, wiper arm, and blade. 2. Function of wipers: Wipers are devices used to remove raindrops and dust attached to the vehicle's windshield, improving the driver's visibility and enhancing driving safety. Due to legal requirements, almost all cars worldwide are equipped with wipers. Rear windows of hatchbacks and SUVs also often have wipers.

[AlessandraFitz]

When driving, one wiper moves while the other doesn’t. I’ve encountered this issue several times, and it’s mostly due to problems with the wiper linkage or connecting mechanism. The wipers are driven by a single motor, but the linkage transmitting motion to each arm may be worn, loose, or rusted, causing only one side to move. If the connecting pin of the wiper arm falls off, the same issue occurs—you can first check if the arm is stuck or misaligned. Another common cause is damage to the motor’s output gear, where only part of the gear is functioning. In winter, frozen arms stuck to the windshield are also a risk, so ice buildup should be cleared promptly. Avoid forcing them to operate to prevent motor burnout, and visit a repair shop as soon as possible for a professional inspection with proper tools.

[McGideon]

When one wiper moves while the other doesn't, as a car owner, it's quite frustrating. Common causes include rusted or broken linkage. The connection pin of the wiper arm might be loose, causing disconnection, or rainwater accumulation inside may have caused rust and jamming. Try manually checking the non-moving arm to see if there's resistance; if there's unusual noise, the gears might be worn and need replacement. If the entire circuit is short-circuited but only one wiper fails, the fuse is likely fine. Remember to clear leaves and debris before rain to avoid blockages. If it's a simple fix, adjust it yourself; if it's complicated, go to a 4S shop for professional help—don't risk compromising driving safety.

[LeAlex]

With years of experience in car repair, when one wiper moves while the other doesn't, it's mainly due to a linkage mechanism failure. Worn or deformed connecting rods can't drive the other side, or the arm pin may have fallen off causing jamming. Manually shake the non-moving arm to check for rust seizure; if movement isn't smooth, add some lubricating oil; in severe cases, replace the linkage. A faulty motor usually stops both wipers, rarely causing issues with just one. Don't overlook accumulated dirt in the washer fluid clogging small parts—cleaning them out should fix it. Freezing weather can also cause similar problems. Get it repaired promptly to avoid poor visibility during rainy days.

[Greyson]

Experience with older cars shows that wiper issues often stem from rusted or damaged linkage rods. Years of driving have taught me not to rush into random fixes—gently lift and wiggle the arm to check for movement. If it's loose, the connecting pin might be cracked and simply needs replacement. If it still won't budge, internal rust likely affects the drive side; try adding some engine oil for lubrication. In winter, watch for frost sticking to the arm hindering motion. Newer cars have more complex electronic systems, but individual failures are usually mechanical rather than electrical. When in doubt, consult a professional mechanic—safety first, don't penny-pinch on small repairs.