Over time, a wiper switch in a vehicle can become worn out or damaged, so that it no longer works in all settings. For a wiper switch connected to the steering wheel, it can pull away from the steering wheel, exposing dangerous wires. It is important to change the wiper switch as soon as possible to avoid problems while driving in the rain, as well as potential electrical shock. With a new switch and a few common tools, you can easily complete this repair yourself in less than one hour.
Open the car hood. Disconnect the negative battery cable from the car battery. Use the ratchet set to remove the battery cable if necessary. Take care not to shock yourself during the removal process by never touching the positive side of the battery.
Disconnect the windshield wiper wiring harness from the steering wheel. Disconnect the wires with pliers, and unscrew the switch from the steering wheel with a screwdriver.
Use pliers to connect the new switch to the steering wheel. Connect all wires and ensure they fit securely.
Insert the new switch into the side of the steering wheel. Screw the switch handle in place.
Reconnect the negative battery cable. Test the new switch by turning the car key in the ignition to the half on position where the internal components of the vehicle turn on, but the engine is still off. Turn the wiper switch on and test all settings. If the blades do not work properly, adjust the wiring or the position of the switch as necessary.
