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Hello. Welcome to Just Answer. Please allow me to assist you. On the back of the wiper motor is a connection. This connection involves a bushing. This bushing fits into the end of the wiper linkage (sometimes call the 'wiper transmission'). Some of the bushings can be replaced, some cannot, it depends on the configuration you have. If you can move the wipers back and forth across the windshield, by hand/manually (wiper motor off), the wiper linkage has become detached from where it attaches to the wiper motor connection point.
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