Intermittent Switch Input Signal Check

With ignition switch in ACC position, turn wiper switch to INT or OFF position. With a voltmeter, check voltage between BCM terminals No. 25 and 29. See Figure. With wiper switch in OFF position, meter should read battery voltage. With switch in INT position, meter should read zero. If voltage readings between terminals No. 25 and 29 are correct, replace BCM. If values are not correct, check wiper switch. See WIPER/WASHER SWITCH . If wiper switch is faulty, replace wiper switch. If wiper switch checks okay, check continuity between wiper switch and BCM. If continuity is okay, replace BCM. If continuity is not okay, repair harness.