Check www.autozone.com, they have a Repair Info section that covers Buick LeSabre with this info.
does not have one......in wiper motor
the arm that controls the wiper arms has fallen off the motor.there is usually a clip that holds it on.Look under the cowl for access
The wiper motor bracket has a tab that can bend causing the wipers to park vertical. Either attempt to bend the tab back, or replace the wiper motor bracket itself.
Most or all years of Buick LaSabre have hook-end wiper arms. Be sure to get the correct replacement wipers and they usually will have step-by-step, illustrated instructions. Normally there's a little tab where the wiper blade is inserted in the the wiper arm hook. Press the tab and pull the wiper blade out of the hook. See video for Hook-End Arms below.
The fuse box on a 2000 Buick LeSabre is located in the side of the dash on the drivers side. You will have to open the door to pull the cover off of it. The fuses are then labeled.
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Remove the wiring harness from the wiper motor. Remove the windshield wiper arm from the wiper motor. Remove the wiper motor retaining screws. Reverse the process to install the new wiper motor.
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