Gather the required tools and replacement master window switch.
Disconnect the battery: To ensure safety, disconnect the negative terminal of the battery to avoid any electrical short circuits.
Locate the master window switch panel: It is typically located on the driver's side door panel.
Pry open the door panel: Carefully pry open the door panel using a plastic pry tool, starting from the edges. Be cautious not to damage the panel or door trim.
Remove the old switch: Once the door panel is open, locate the master window switch assembly. Remove the screws holding the switch in place and disconnect any electrical connectors.
Install the new switch: Carefully align the new master window switch in its place and reconnect the electrical connectors. Secure the switch with the screws you removed earlier.
Test the switch: Once the new switch is installed, test all the window controls to ensure proper functionality.
Reattach the door panel: Reattach the door panel by pressing it back into place until it snaps securely into position. Reconnect any electrical connectors for other controls on the door panel.
Reconnect the battery: Finally, reconnect the negative terminal of the battery to restore power to the vehicle.
Once these steps are completed, your 1996 Toyota Avalon XL should have a functional master window switch.
