Why is the windshield wiper weak?

[DiMaci]

Windshield wiper weakness can be caused by: 1. Lack of lubrication in the linkage mechanism; 2. Short circuit in the wiper motor coil; 3. Aging and weakness of the wiper arm spring; 4. Dirty windshield with oil film; 5. Motor malfunction, resulting in weak rotation; 6. Poor electrical connection to the wiper motor, leading to abnormal power supply. Maintenance methods for windshield wipers include: 1. Regularly clean the wipers; 2. Periodically check if the car wipers are functioning properly; 3. Avoid forcing the wipers when there are objects on the windshield; 4. Use the slow speed setting; 5. Lift the wipers when parking under direct sunlight; 6. Use specialized car cleaning agents.

[MacWalter]

Last time my car's wipers were all floppy, so I took it to the repair shop and found out the wiper linkage was the problem. The ball joint on that connecting rod was badly worn and rusted stiff—the wiper arm moved like an old man doing calisthenics, really struggling. The mechanic said this kind of mechanical failure requires replacing the entire linkage assembly, otherwise the windshield wouldn’t get properly cleared in the rain. Now I regularly spray some rust remover on the joints for maintenance—I don’t dare let the wipers strain like that again, way too dangerous.

[JakeFitz]

A veteran driver with ten years of experience tells you that if your wipers are weak, it's likely the motor is failing. Last week, my car had this issue—the wipers moved as slow as a sloth climbing a tree. When I popped the hood and tested the motor, the carbon brushes were nearly worn flat, and the rotor was so stiff it could barely turn. The mechanic straight-up removed and replaced the motor, explaining that these wiper motors with turbo reduction gears lose power over time as the gears wear and slip. He advised checking them before the summer rainy season hits, so you don’t get caught off guard in a downpour.

[DeLucille]

My little Fit had sluggish wiper movement before, and upon closer inspection, I found the wiper arm was installed at a wrong angle. The mechanic used a protractor to demonstrate that when the rubber blade exceeds 55 degrees against the windshield, it won't wipe properly - the normal angle should be between 35 to 45 degrees. After readjusting the clip position, it now swipes with a satisfying whoosh. A friendly reminder: never use excessive force when installing wipers. My car's mounting tab got bent during the last blade replacement, costing me an extra 50 yuan for straightening.

[SanEmilia]

Wipers suddenly slowing down? Don't rush to replace parts. Last time I encountered this, I opened the fuse box and found the No. 16 wiper fuse burnt black. Bought a new fuse for fifteen bucks, replaced it, and the wipers immediately regained their strength. A mechanic taught me a clever trick: if the new fuse burns out again after insertion, it might be a circuit short. Feel the motor wiring harness - if it's hot, it indicates the short is near the motor. However, in newer cars, the fuse box is usually under the driver's seat, so female car owners are advised to let professionals handle it.

[VanAustin]

In winter after snow, the wiper blades feel like they're glued down? It's most likely because the rubber strips have frozen stiff and deformed. I suffered from this last year in Northeast China—at minus twenty degrees Celsius, the wipers couldn't move at all. An experienced auto mechanic taught me to use a hot towel to warm the rubber strips and restore their elasticity, then spray a specialized rubber softener. The key is to replace the wiper blades with low-temperature rubber ones before winter, as the original rubber strips turn into hard plastic at minus ten degrees. Now, I always stock up on two sets of silicone wiper blades in advance, which work great for scraping ice and snow without damaging the glass.