Hyundai 98110-0W000 Windshield Wiper Motor Assembly

First, ensure the battery is in good condition and has a strong charge. If the battery is fine, remove the wiper motor and operate the wiper arms by hand to check for binding linkage and pivots. Lubricate or repair as necessary, then reinstall the motor. If the wipers still operate slowly, check for loose or corroded connections, especially the ground connection. If all connections are okay, replace the motor.