Wiper Motor Internal Park Switching
A SPST switch may be used when the motor is controlled by an Electronic Control Unit (ECU) with two relays - one for Hi/Low and the other for Run/Brake. The SPST switch is read by the controlling Microprocessor. It is possible for the park position to be adjusted - if the Park switch actuates slightly earlier in the sweep, then the micro-controller can delay the brake actuation for a certain time (10s-100s of ms) to optimize the parking position. This time can be programmed for each individual car to take account of mechanical variation and installation tolerances.