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Revision as of 05:19, 16 August 2009
The wiper switch does not have a hot wire. It only serves to connect various circuits to ground (earth). 12V is supplied to both the wiper motor and washer motor by the same fuse.
Wiper Motor
When the ignition switch is turned to IGN, the wiper motor is always supplied with 12V. When it is in the PARK position (wipers at bottom of windshield) an internal cam breaks the ground circuit. The motor will not turn untril GROUND is supplied by pulling the wiper switch knob.
Basic test: LR wire (blue/red) should always read 12V when when IGN is on.
When the wiper knob is pulled out to the first position, the low-speed motor wire is grounded, so the motor turns slow speed. When pulled out to position 2, the high-speed wire is grounded. When the knob is pushed all the way in, the motor continues turning until the PARK cam breaks the ground circuit.
Windshield Washer
The Kangaroo Bag washer motor is grounded through the dashboard wiper switch. Twist the wiper knob to supplied GROUND to the washer motor. 12V is supplied through the Fuse Box, always when the ignition switch is turned to IGN.
