Cardone Select 85-440 New Wiper Motor Every motor is lubricated with the precise amount of grease needed for quiet operation Brushes are designed to original specifications to ensure armature and contacts are properly matched Magnets deliver the exact amount of torque needed to withstand extreme weather conditions and compensate for worn components in the wiper and window lift systems All motors are 100% load tested Check the wiring harness ground, terminal ground lug or ground strap. If the motor still does not operate properly, check the switch and switch circuit. Most vehicles equipped with this feature have a rain sensor permanently mounted to the inside of the windshield in front of the rear view mirror. Make sure the connector weather seal is in place and in good condition, if so equipped. Replace if necessary. Make sure harness is well insulated and routed as designed. Make sure motor is well grounded. Make sure motor is mounted as designed. Check all drain paths  clean and clear of any debris. When re-installing cowl shield, ensure that there is a weather tight seal between cowl and windshield glass.  An improper seal or gap will cause premature failure due to water damage.