Check for continuity between the terminals while operating the wiper and washer switch. If it is not normal condition, replace wiper and wiper switch.
Remove the steering column upper and lower shrouds after removing 3 screws.
If necessary of removing the wiper & washer switch (A), release the lock of wiper switch using tool without removing the steering wheel and the clock spring.
Install the wiper switch.
Install the steering column upper and lower shrouds.