Wipers not working

Good morning.

It sounds like either the wiper motor is failing internally or the wiper arms are slipping on the transmission.

Roy

REMOVAL

1. Remove the wiper module from the vehicle.See: Wiper Motor > Removal and Replacement > Wiper Module - Removal
2. Remove the wiper links from the wiper motor crank.
3. Remove the 3 screws that attach the wiper motor to the module bracket.
4. Remove the motor from the module bracket leaving the crank attached to the motor.

1. Release the hood latch and open hood.
2. Disconnect and isolate the battery negative cable.
3. Remove the wiper arms.See: Wiper Arm > Removal and Replacement > Wiper Arms - Removal.
4. Remove the cowl coverSee: Cowl Moulding / Trim > Removal and Replacement > Removal.
5. Disconnect the wiper module wire connector.
6. Remove the wiper module fasteners.
7. Remove wiper module and set on bench.

How can I determine if it is the motor failing or the arms slipping?

Put your hand on the base of the wiper by where it meets the linkage. If you can feel the vibration there, good chance the nut is loose securing it. The motor will also be working it is normal cycle.

Roy