Tools You'll Likely Need:
* Socket set (metric)
* Ratchet and extensions
* Screwdrivers (Phillips and flathead)
* Pliers
* Wire cutters/strippers
* Electrical tape
* New wiper motor
* Shop towels or rags
* Penetrating oil (like PB Blaster)
Steps:
1. Disconnect the Battery: This is crucial to prevent electrical shorts and injury. Disconnect the negative (-) terminal first.
2. Access the Wiper Motor: This is usually located under the cowl (the area under the windshield). You'll likely need to remove the wiper arms.
* Remove Wiper Arms: Loosen the nut securing each wiper arm to the wiper transmission. Sometimes these nuts are stubborn and require penetrating oil and a lot of force. *Mark the position of the arms relative to the transmission before removing them to ensure correct reinstallation.*
* Remove the Cowl: The cowl typically involves removing several screws and possibly clips securing it. Again, penetrating oil may be necessary to loosen rusted fasteners. Be gentle to avoid breaking plastic clips. Some Wranglers may require partial removal of the windshield wipers or the windshield trim.
3. Disconnect the Electrical Connector: Carefully disconnect the electrical connector from the wiper motor. Take a picture or note the wire arrangement before disconnecting to ensure proper reassembly.
4. Remove the Wiper Motor Mounting Bolts: Locate and carefully remove the bolts securing the wiper motor to the vehicle's body. These bolts can also be rusted or seized. Use penetrating oil as needed.
5. Remove the Wiper Motor: Once the bolts are removed, carefully remove the wiper motor from its mounting location. There may be some linkage connected – disconnect carefully.
6. Install the New Wiper Motor: This is the reverse of the removal process.
* Install the new motor securely into its mounting location.
* Reconnect the electrical connector, ensuring proper connection based on your notes or picture.
* Reconnect the linkage.
* Reinstall the cowl and wiper arms in their original positions.
* Tighten all fasteners securely.
7. Reconnect the Battery: Reconnect the battery's positive (+) terminal.
8. Test the Wipers: Turn on your wipers to test the new motor. If they don't work, double-check all connections and wiring.
Important Considerations:
* Rust: 1991 Jeep Wranglers are prone to rust. Expect to encounter some rust and seized fasteners. Penetrating oil is your friend.
* Patience: This is not a quick job. Be patient and methodical.
* Repair Manual: A repair manual specific to your vehicle is highly recommended. It will provide detailed diagrams and instructions specific to your model.
* Safety: Always use caution when working on your vehicle. Wear safety glasses and gloves.
If you're not comfortable with this repair, it's best to take your Jeep to a qualified mechanic. Improper installation can lead to further damage.
