Wipers won't return to original position

My wipers on my '93 taurus turn on and off okay, but when I turn them off they go up or just stay where they are instead of returining to their original position, how do i make them go where they’re are supposed to?

You will probably have to replace the wiper motor. I had the same problem on a 1988 Taurus that I once owned. Inside the case holding the motor is a park switch. This supplies power to the motor when you turn the switch off to park the wipers at the bottom of the windshield. Since this switch and the wiper motor are all one unit, the whole unit needs to be replaced.

If the wipers stop at the position they’re in when the switch is turned off (fail to park), disconnect the multi-function switch electrical connector. (Usually found on the firewall on the drivers side)

If the wipers now park, replace the multi-function switch.

If the wipers still don’t park, check the wiring from the wiper motor to the switch for for a short circuit. If the circuit is good, replace the wiper motor.