* Worn-out wiper motor: The motor itself might be drawing excessive current due to internal damage (worn brushes, seized components). This is the most likely culprit.
* Short in the wiring: A wire might be frayed, chafed against metal, or otherwise damaged, causing a direct short to ground. This could be anywhere in the wiring harness from the fuse to the motor. Look carefully for any exposed wires, especially near moving parts like the wiper arms.
* Problem with the wiper switch: A faulty switch could be sending too much power to the motor.
* Short in the wiper mechanism: There might be a short within the wiper motor assembly itself, such as a short in the motor housing or its internal components.
* Excessive moisture: Water intrusion into the wiper motor or wiring harness can cause a short.
What to do:
1. Visual inspection: Carefully examine all wiring related to the wipers, from the fuse box to the motor. Look for any signs of damage, fraying, or corrosion. Pay close attention to areas where the wires might rub against metal parts.
2. Check the wiper motor: If you're comfortable working with car electrical systems, you can try testing the wiper motor's resistance with a multimeter. A low resistance indicates a problem. (However, this step requires more technical skill and proper safety precautions.)
3. Professional help: If you don't find any obvious problems or aren't comfortable working with car electrical systems, take your car to a mechanic or auto electrician. They have the tools and expertise to diagnose and repair the short circuit safely. Ignoring the problem risks a fire hazard.
Do not keep replacing the fuse without addressing the underlying short circuit. This is a temporary fix that puts your car at risk.
