Reasons for Weak Wiper Motor?
2 Answers
The reasons for weak wiper operation may include lack of lubrication in the linkage mechanism, short circuit in the wiper motor coil causing weakness, or aging and weakening of the wiper arm spring. Detailed analysis of weak wiper operation: Since wiper blades are rubber products, they tend to age over time, affecting their performance. A dirty windshield with oil film can cause the motor to malfunction and operate weakly during cleaning. There may be poor electrical connections in the wiper motor's power supply, leading to abnormal motor operation and occasional weak wiper performance. Solutions: Check the wiper motor - it can be seen after opening the car hood. Touch the wiper motor with your hand; if it feels hot, it indicates an internal short circuit and the motor needs replacement. Check the wiper fuse - each electrical device in the car has a fuse for circuit protection. If the wipers don't work, check if the wiper fuse is blown and replace it with a spare fuse from the vehicle.
When it comes to weak wiper motor performance, as someone who’s been tinkering with car issues for years, I can share some common causes. The most likely culprit is aging of the wiper motor itself—severe wear on internal brushes or coil failure can reduce rotational power. Next, low car battery voltage leads to unstable power supply, causing sluggish wiper movement, especially in cold winters or after prolonged parking. Don’t overlook mechanical parts: rusted/jammed wiper linkages or overly tight blades (e.g., snow/ice pressing on them) add extra strain. Poor electrical contacts—loose plugs or corrosion from moisture—also disrupt current flow. Regular maintenance matters: inspect the motor and clear debris around wiper arms every six months to prevent issues. For older cars, timely part replacements save hassle.
