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Can you move the wipers by pulling on them? If you can and they easily move, the wiper linkage is disconnected. If you can hear the motor run and the wipers are inoperable, suspect a seized wiper pivot
It Sounds Like, Either The Arms Are Loose ,If You Can Hear Something Moving Behind The Dash, Or The Linkages Are Seized ,If The Motor Just Hums No Movement Heard,In Which Case Try Spraying Q 20 On The Linkage And Try Moving The Wiper Arms By Hand To Get It Going Again, If Not The Motor May Just Be Burn;t Out.
everyone will tell you that the linkage/transmission will need to be replaced but it doesn't,,most of the time its a bushing and O'Rielly's auto parts sells a "WIPER LINKAGE BUSHING ASSORTMENT" part# 49447 and it sells for about $5 bucks. Its fits tight and took a few minutes to install but its worth the trouble to save about $100
WIPER ARM LINKAGE COULD BE BINDING.REMOVE WIPER ARM TO SEE IF WIPER MOTOR OPERATE SLOWLY.IF YES CHECK TO MAKE SURE WIPER MOTOR GETTING GOOD GROUND CONNECTIONS BY CHECKING MOVING WIRES .IF WIPER MOTOR SPEEDS UP YOU HAVE GROUND WIRE PROBLEM. IF WIPER MOTOR REMAIN SLOW GROUND WIRES CHECK OUT OKAY.REPLACE WIPER MOTOR.IF WIPER MOTOR RUN FAST NORMAL SPEED AFTER DISCONNECTING WIPER ARM.WIPER ARM LINKAGES IS BINDING OR NEED SOME LUBRICATION TRY WD40 SEE WHAT HAPPENS.LUBRICATION DONT HELP WIPER LINKAGE COULD BE DAMAGED.
The windshield motor is connected to the windshield wiper's arms via mechanical linkage. The linkage had been severed. There's a lockpin that secures this linkage. If rust/corrosion had built up on this lockpin, it may had fallen off. Buy a Haynes or Chilton manual to see how to access the wiper motor area.
THEY CALL IT YHE WIPER TRANMISSION. THE LINKAGE THAT IS CONNECTED TO THE WIPER MOTOR FELL OFF BECAUSE THE NUT THAT KEEPS IT SECURED TO THE MOTOR LOOSENED & FELL OFF ALLOWING THE LINKAGE TO FALL OFF OF THE WIPER MOTOR.FIRST YOU HAVE TO GET A NEW NUT TO HOLD ON THE LINKAGE (IT MIGHT BE RIGHT UNDER THE WIPER MOTOR IF THERE WAS SOMEPLACE FOR IT TO FALL)REINSTALL THE LINKAGE, (IT ONLY FITS ONE WAY) PUT ON THE NEW NUT (TIGHTEN IT ENOUGH BUT MAKE SURE THE WIPERS CAN STILL ROTATE) AND YOU SET