Depending on the year, but....there is should be four crews just below the windshield and two under the hood that hold the panel between the hood and windshield. You will have to remove the wiper arms first, remember to mark their position.
The wiper motor is mounted on the left inside of the windshield frame on the same bracket as the VIN. Fold down the windshield and is fully accessible.
The wiper motor is on the driver's side, behind the dash board. if you fold you front windshield down, that will expose your wiper motor.
You need to fold down the windshield. So undo the torque head screws on each side & fold forward carefully. The wiper motor sits right under the VIN plate on the windshield.
The windshield needs to be folded into the down position to access the wiper motor. There are a couple cut-outs in the metal of the cowl that allows access to the wiper motor & linkage. There are release bolts on either side of the windshield & of course the top needs to be off.
you need to remove the blades,turn on the wiper motor let it go through the circulation then turn off the switch , this is to make sure the wiper motor was in correct position when they were installed then put them back on and try it again
It is located under the windshield cowl (the plastic cover with the holes in it, directly under the windshield). To expose it - remove the wiper arms, and the retaining nuts on the wiper shafts, then remove the screws holding down the cover.
I would start with testing the "park" switch inside the cover of the windshield wiper motor.
You get to drop you windshield...the wiper motor is under it. Unbolt the rollbars at the top of the windshield, then unbolt both brackets on each side of the dash. Carefully fold the windshield down on the hood. Then you'll see your wiper motor. I just did this yesterday on my 95 YJ. Try putting some PB Blaster/WD40 on all the bolts and letting it soak in. I had to make a trip to Fastenal for a few replacements.
Take the wiper arms off. Then undo your windshield so that it folds down onto hood. Remove the three screws holding the wiper motor on. disconnect the wiper drive link. remove the wire clip from bottom on the windshield frame. Take out the 4 screws on the bottom of windshield that hold on the seal. (they get in the way of pullin the motor out). Pull the motor and link out through the access hole. Pry the link off the motor pivot. Do not remove the crank arm adjusting nut though. That's it. Sounds way harder than it is.
at the wiper linkage that is at the base of the wiper arms there is a retainer clip that has broken allowing the linkage from the motor to not move the arms. This happened to me on an 1989 ford pick-up once. It was a pretty easy fix once I figured out the right timing of the linkage.
You need to get the windshield folded down. This means remove the top, then the front sport bar members. On each side is a bracket that holds the windshield upright. Remove screws to allow windshield to be folded down (gently) on the hood. The wiper motor is in the top of the cowl & should easily be visible. It might not be easily accessible, but it will be visible.
Well you have to take the plastics off of the windshield first. The ones that are under you wiper blades. then you just unplug the blade motor. Take the 3 screws out. Then reach down throught the firewall where you took the plastics off and break the nut loose that holds the motor to the free swinging arms, and WA la. Reverse order to but it back on obviously.