Hi pizzaguy, thanks for your questions. Here's what I know:

1. I measured ~12V between Pin 1 of the BCM (corresponding to Pin 1 of C2) and Pin 41 of the BCM (corresponding to Pin 41 of C2) when turning the ignition switch to "on", irrespective of the MF switch position (off, int, low, high). I had thought it was positive voltage (i.e. Pin 1 at the higher potential), but given your question ("How do you read the diagram?") I'm no longer sure and would have to check again. Voltage goes to zero after roughly the same amount of the time it took for the 7-8 cycles.
   • In retrospect, I should have measured the voltage at each pin with respect to chassis ground. In either event, there is clearly a voltage differential between Pins 1 and 41 that is driving the motor whenever the ignition switch is turned to "on", irrespective of the MF switch position (off, int, low, high).
2. I did check the park switch operation in the wiper motor. As expected, with the wipers parked, there is ~0 ohms resistance between C2 sockets 40 and 41 (MAKE). In all other positions this is an open circuit (BREAK)
3. I did some poking around with my new Micropod 2. This is still new to me, but believe I learned the following today:
   • BCM module is functional with no DTCs and appears to be operating as expected.
   • The BCM Input/Output functions showed correct operation of the MF switch (see picture below; correct indicators (on/off) were read with the corresponding position on the MF switch).
   • The BCM Input/Output functions showed correct indication of "WIPER MOTOR STUCK" (i.e. it was "NOT ACTIVE" when the wipers were in motion, and "ACTIVE" whenever the wipers stopped).
   • The WIPER CKT GROUND function always read "NOT ACTIVE", regardless of wiper operation. I don't know what this means.

Back to your question - "How do you read the diagram?" - at first I thought that pin 41 would be at ground potential, despite the words in the diagram, because the service manual prescribed applying B+ to Pin 1 and ground to Pin 47 to test the operation/function of the motor. Also, the harness wiring color is Red for Pin 1 and Black for Pin 47. However, if you take the words literally in the diagram, your interpretation makes much more sense (Pin 41 is HIGH, and the low/high speed controls are switched grounds. At park, +12V would be applied to the "Wiper Park Switch Sense" (pin 40) to signal the control circuitry to switch either Pin 1 or Pin 2 HIGH to shut off the motor).

Which leaves the remaining question: With no voltage present at Pin 65 at ignition "on", why is there a voltage differential between Pins 1 and 41, driving the motor at all?