I don't know about your wiper motor specifically, but normally there are 3, or 4 terminals:...I understand from reading previous posts on this and other threads that the second wire from the top is the power supply that parks the wipers when the switch is turned off. In a document someone posted years ago (thank you) called Bosch Terminal Designations the wire that parks the motor is described as "Wiper (+), self-parking switch off". I am trying to determine when this wire is supposed to be energized.
1) Ground (-) - This may be the motor frame itself, grounded thru the vehicle steel, not necessarily a terminal.
2) Self parking (+) - This should always be connected to the accessory power and live when the ignition switch is in the "on" and "accessory" positions. This supplies power to the motor when you switch off the wipers and is internally interrupted when the wiper returns to the park position. If you just applied power to this and the wiper is already in the park position nothing will happen. If the wiper is anywhere else the wiper will cycle to the park position. (Sometime on newer vehicles this is the actual and only power supply, 3/4 are just signals to start.)
3&4) Low speed/High Speed/Intermittent/Wiper (+) - Varying names and attributes, but these all start the wiper in motion and should be connected to the appropriate wiper switch position.