Why do the wiper's first and second gears fail?
2 Answers
The reason is poor contact in the first and second gear switches and wiring, so you can check the toggle switch. Here are some details about wipers: 1. Car wipers: Also known as windshield wipers, they are blade structures installed in front of the windshield, composed of a motor, reducer, four-bar linkage, wiper arm spindle, and wiper blade assembly. 2. Function of wipers: Their main purpose is to clear rain, snow, and dust from the windshield that obstructs visibility. 3. Operation of wipers: The rear wiper can be activated by moving the wiper lever forward or backward, which differs from the up-and-down operation of the front wiper switch. Moving the lever forward or backward controls the rear wiper's on/off function, intermittent operation, automatic mode, and washer fluid spray. The rear wiper is the wiper for the rear windshield. Rear wipers are commonly equipped on SUVs, MPVs, hatchbacks, and some liftback vehicles.
I've found that wiper speed 1 and 2 failures usually have several common causes: The most prevalent is aging and rusting of switch contacts—last time I fixed my own car, it was due to corroded contacts causing poor connection. Relay failure is also quite common; it controls the current for speed switching, and once stuck, the low speed won't work. A blown fuse is relatively easy to check—just open the fuse box and replace it. Other issues include problems at the motor end or worn-out wiring causing short circuits. When I handled it myself, I first used a multimeter to test the circuit, checked if the fuse was intact, and then verified whether the switch was functioning properly. For regular maintenance, I recommend periodically cleaning the wiper system to prevent rust and testing it before rainy days to ensure safe driving—after all, speed failure during heavy rain is extremely dangerous. If you lack DIY skills, it's best to visit a professional shop for repairs rather than forcing it and risking damage to more components.
