Why is the windshield wiper weak?
2 Answers
The reasons for a weak windshield wiper are: 1. Lack of lubrication in the linkage mechanism; 2. Aging and weak wiper arm spring; 3. The glass itself is dirty with an oily film; 4. Motor malfunction, resulting in weak rotation; 5. Poor electrical connection to the wiper motor, causing abnormal power supply. The maintenance methods for windshield wipers are: 1. When using the wiper to remove dust from the windshield on sunny days, spray glass cleaner instead of dry wiping; 2. Manually clean other stubborn or hard dirt on the glass; 3. When lifting the wiper blade, hold it by the spine and gently place it back; 4. In winter, use an ice scraper to remove ice from the windshield first; 5. Repair any wiper issues as early as possible.
My wipers have been moving as slow as a sloth lately. After some troubleshooting, I found three key issues: First, the wiper linkage is rusted, with reddish-brown rust residue at the pivot points - needs WD-40 lubrication. Second, the drive gears are excessively worn, making metallic grinding noises when idling. Third, the motor is aging - its casing gets hot enough to fry an egg. It scared me during the last heavy rain when they failed, I almost had to pull over and wipe the windshield manually. Recommendation: First test the motor voltage - should be around 12V normally, consider replacement if below 10V. Worn rubber blades also increase resistance, regular replacement can extend motor life.
