Q: How to Change the Wiper Switch on a Buick LaCrosse?
A: Make sure to deactivate the sir system first, after which you should carefully follow the proper steps. Take off the steering column trim covers and cut open the steering column wiring harness tie straps. Connectors should be removed from the module, and the wire harness shield at the bottom of the steering column should be folded down to pull out the wire harness , keeping track of its original direction. Take off the electrical connectors (1,3) from the windshield wiper and washer switch, then push down the locking tab on the switch so you can take it off the steering column. For installation, put the new windshield wiper and washer switch onto the steering column and plug in the electrical connectors (1,3). Reconnect the wire harness to the wire harness shield on the steering column, put the switch's connector in place, and make sure the tie straps (1,2) are tight. In the last step, fit the steering column trim covers back on and turn the sir system back on.