For wiper switch maintenance, first take out the negative cable from the battery. If you can, take off the tilt steering column lever. You should then remove the upper and lower shrouds on the steering column and then take out the lower fixed column shroud. Place the upper fixed column shroud up to see the multi-function switch in the back. Unscrew the tamper proof mounting screws with a Snap On tamper proof torx bit TTXR20B2 or the equivalent, since these hold the multi-function switch to the steering column. Take the switch gently out from the steering column, unscrew the connector on the wire harness attached to the switch and plug to remove the multi-function switch wire harness connector. After removal, follow the opposite steps, particularly when tightening: secure the switch wire harness connector screw at 2 Nm (17 in. lbs.) and the switch mount bolts at 2 Nm (17 in. lbs.).