How to Bench Test Wiper Motor?

I may be wrong but...

The motor does not get power to park.

The power on the park cir gets broken every revolution.

When the switch is in low or high the power supplied there overrides the park cir.

When the switch is then turned off, the park cir still has power and runs the motor till the park plate switch opens. Then the motor comes to a stop. If the windshield is dry the blades will stop higher then if it is wet.

I believe but am not 100 percent sure, that the voltage / current is reduced by the resister on the 2 speed switch. Rather than or in addition to using alternate coils