1. Preparation:
* Gather tools: You'll need a variety of screwdrivers (Phillips and flathead), possibly some sockets and wrenches (sizes will depend on your specific Wrangler), pliers, a trim removal tool (to avoid scratching the plastic), and possibly a small pry bar.
* Consult a repair manual: A Chilton's or Haynes manual specific to your '89 Jeep Wrangler YJ will provide detailed diagrams and instructions. This is highly recommended.
* Gather replacement parts: Ensure you have the correct blower motor for your vehicle.
2. Accessing the Blower Motor:
* Remove the passenger side dash panel: This is the most significant part of the job. The exact procedure varies slightly depending on trim level and options, but generally involves removing screws and possibly some clips securing the panel to the dashboard. Use a trim tool to carefully pry off the panel without breaking any plastic clips. The manual will guide you through this step. You may need to remove the glove box as well for better access.
* Locate the blower motor: Once the dash panel is removed, you should see the blower motor housing. It's usually located behind the glove box area, near the firewall.
3. Removing the Blower Motor:
* Disconnect the electrical connector: Carefully unplug the electrical connector leading to the blower motor.
* Disconnect the air duct: There are usually several air ducts connected to the blower motor housing. Carefully disconnect these. Take pictures before disconnecting anything if you're unsure about reassembly.
* Remove the blower motor mounting screws: The blower motor is held in place by several screws. Remove these screws.
* Remove the blower motor: Once the screws are removed, the blower motor should come out. It might be a tight fit, so gently wiggle it free.
4. Installing the New Blower Motor:
* Install the new blower motor: Carefully insert the new blower motor into the housing.
* Secure the blower motor: Tighten the mounting screws.
* Reconnect the air ducts: Carefully reconnect the air ducts to the blower motor housing.
* Reconnect the electrical connector: Plug the electrical connector back into the blower motor.
5. Reassembly:
* Reinstall the dash panel: Carefully reassemble the dash panel, ensuring all clips and screws are properly secured.
* Reconnect the battery: Reconnect the negative battery terminal.
6. Testing:
* Test the blower motor: Turn on the ignition and test the blower motor on all speeds to ensure it's working correctly.
Important Considerations:
* Take pictures: Before you disassemble anything, take lots of pictures. This will be invaluable during reassembly.
* Patience is key: This is not a quick job. Take your time and be methodical.
* If you're uncomfortable: If you're not comfortable with this type of repair, it's best to take your Jeep to a qualified mechanic. Incorrect reassembly could damage your dashboard or create other issues.
This is a general guide. Refer to a repair manual specific to your 1989 Jeep Wrangler YJ for detailed, model-specific instructions. The location and access to the blower motor might have slight variations depending on the trim level and options on your specific vehicle. Remember safety first! Always disconnect the negative battery terminal before starting any electrical work.
