There is no switch. If the wipers park in the middle or at the top of the winshield you need to replace the motor. the fault is in the logic
The motor needs to be replaced. There is a "switch" in the motor that "parks" the wipers. This happens when current is removed from the motor. Your "switch" in the motor is not allowing this to happen. Replace the motor.
Have you checked to make sure the fuse is good?
http://www.ehow.com/video_4936070_install-windshield-wiper-motor.html?pid=1&cp=1 (this is very informative video on how to remove and replace a windshield wiper motor)
The parking switch inside of the wiper motor is defective. Replace the wiper motor.
To replace the windshield motor on a 2002 Kia Optima, use a fused jumper wire to bypass the relay of the wiper motor. Then use the positive lead to touch the positive terminal on the relay. Remove all mounting bolts of the windshield motor and gently pull the motor out. Replace with new.?æ
If there is current going through the wire to the blower switch, try bypassing the switch with a jumper wire. If the blower motor works, then replace the switch. If the blower motor does not come on, then you probably need to replace the blower motor.
The wiper motor has a switch inside of it. When they are turned off and the wipers go to the down position it trips the switch in the motor that tells the computer they are in the down position. If that switch in the motor is faulty, the wipers are repositioning until the switch is tripped to the off position. THE FIX.... Replace the wiper motor.