K 2500 Truck 4WD V8-379 6.2L DSL VIN C FI (1989)
Wiper Switch: Testing and Inspection
Wiper Switch Test
Front wiper switch continuity test
Disconnect electrical connectors from wiper motor.
Check switch continuity using a digital voltmeter with ignition switch in the On position. Continuity should exist at various switch positions
between terminals as shown, Fig. 19.