Rear Window Wiper Motor

1. As shown, use a 12 V battery and connect its (+) and (-) terminals to terminal "B" and terminal "C" respectively. Then motor (1) should rotate at a rate of 35 to 45 rpm.




2. Testing automatic stop action
a. First, connect battery (+) terminal to terminal "B" and battery (-) terminal to terminal "C" and let the motor (1) turn.
b. Then disconnect terminal "B" from battery and let the motor stop.
c. Next connect terminal "B" and "D" with a jumper wire (2) and connect terminal "A" to battery (+) terminal. Observe the wiper motor turns once again, then stops at a given position.
d. Repeat these steps several times, and inspect if the motor stops at the given position every time.