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Front Wiper And Washer Switch (In Combination Switch) On-Vehicle Inspection

Disconnect negative cable (-) at battery.
Disconnect combination switch lead wire coupler.
Use a circuit tester to check the continuity at each switch position. If any continuity is not obtained, replace switch.

Fig 1: Checking On-Vehicle Front Wiper & Washer Switch (In Combination Switch)
Courtesy of SUZUKI OF AMERICA CORP.