Washer Switch Input Signal Check

With ignition switch in ACC position, measure voltage between BCM terminals No. 26 and 29. See Figure. With washer switch in OFF position, meter should read battery voltage. With washer switch in ON position, reading should be zero. If readings are not correct, check wiper/washer switch continuity. See WIPER/WASHER SWITCH CONTINUITY table under WIPER/WASHER SWITCH. If continuity is no good, replace washer switch. If continuity is okay, check harness continuity between BCM and washer switch. If continuity is no good, repair harness. If continuity is okay, go to next step.