HP 220 - Manual (Page 168)

8Ć20 Removal and Replacement C3187Ć90000
Test Description
Stepper-Motor Test The stepper-motor test continuously cycles the stepper motor, thus raising and
lowering the wiper and the lever mechanism.
It tests the following:
D Stepper motor
D Main PCA
D Cartridge-adjust linkage
D Wiper linkage
Window-Sensor Test This tests the following:
D Window sensor
D Window-sensor cable
D Main PC.