Use a battery or battery charger for this procedure.
Connect ground from battery or negative post of charger to brass ground strap on wiper motor.
CONCEALED 2 SPEED TEST PROCEDURE
Jump the P2 terminal to the ground.
Connect 12v positive to H terminal. Motor should run on high speed.
Connect the L terminal to the resistor and positive to the other side of the resistor, motor should run on Low speed.
Now, remove the ground from the P2 terminal and ground the L terminal and jumper positive to P1 and the motor should park.
NON CONCEALED TEST PROCEDURE
12 volts to H-run on high
Remove 12v from H and apply to resistor other side of res. to L.....low speed
Remove 12v from res. and jump L and P2, put 12v to P1....Park