Here's a general outline. Specific steps might vary slightly depending on your Blazer's trim level and options:
1. Preparation:
* Gather tools: You'll need a socket set (likely 10mm and possibly others), screwdrivers (Phillips and possibly flathead), possibly a ratchet, extension(s), and possibly a panel removal tool to avoid scratching the interior. A new rear wiper motor is essential.
* Consult a repair manual: A Chilton's or Haynes repair manual specific to your 1996 Chevy S-10 Blazer will be invaluable. It provides detailed diagrams and instructions tailored to your vehicle. This is highly recommended to avoid damage.
* Interior Access: You'll likely need to remove the interior trim panel on the rear hatch or liftgate. This usually involves removing screws and possibly some plastic clips. Carefully pry the panel away using plastic trim tools to avoid breaking the clips.
2. Accessing the Wiper Motor:
* Remove Interior Panel: Once the interior panel is removed, you should have visual access to the wiper motor mechanism. The location will vary slightly depending on the specific model. It’s usually located under the rear hatch/liftgate. Sometimes, it’s easily visible, other times you may need to remove more components.
* Disconnect Wiring Harness: Unplug the electrical connector from the wiper motor. Take pictures or make notes of how the wires are connected if you're unsure.
* Remove Mounting Bolts: The motor is typically held in place by several bolts. Carefully remove these bolts, noting their location and length.
3. Replacing the Wiper Motor:
* Remove Old Motor: Once the bolts are removed, carefully remove the old wiper motor. Take note of the motor's orientation and any gaskets or seals.
* Install New Motor: Install the new wiper motor, ensuring it's correctly oriented and seated. Replace any gaskets or seals.
* Secure the Motor: Tighten the mounting bolts to the specified torque (consult your repair manual).
* Reconnect Wiring Harness: Reconnect the electrical connector to the new wiper motor, making sure the wires are securely plugged in.
4. Reassembly:
* Reinstall Interior Panel: Carefully replace the interior trim panel, making sure all clips and screws are properly secured.
5. Testing:
* Reconnect Battery: Reconnect the negative battery terminal.
* Test Wiper: Turn on the rear wiper to ensure it's working correctly. If it doesn't work, double-check all connections and the installation.
Important Considerations:
* Rust and Corrosion: In older vehicles, rust and corrosion can make removing bolts difficult. Penetrating oil can help loosen them. Be patient and avoid stripping the bolt heads.
* Clips: Interior trim panels often use plastic clips that can break easily. Handle them with care. Replacement clips are usually available at auto parts stores.
* Electrical Connections: Double-check all electrical connections to avoid short circuits.
This is a general guide. Referencing a repair manual specific to your 1996 Chevy S-10 Blazer is strongly recommended for detailed, accurate, and vehicle-specific instructions. If you're not comfortable working on your vehicle, it's best to take it to a qualified mechanic.
