Tools You'll Likely Need:
* Socket set (metric)
* Ratchet and extensions
* Screwdrivers (Phillips and flathead)
* Pliers
* Wire cutters/strippers (possibly)
* Electrical tape (possibly)
* Torque wrench (recommended)
* New rear wiper motor
Steps (General Outline – Consult Your Repair Manual!):
1. Disconnect the Battery: This is crucial to prevent electrical shocks and short circuits. Disconnect the negative (-) terminal first.
2. Access the Wiper Motor: This usually involves removing the interior trim panel on the rear hatch or tailgate. You'll likely need to remove the plastic covers and potentially some screws or clips to access the motor. Your repair manual will show exactly how to do this without damaging the panels.
3. Disconnect Electrical Connections: Carefully unplug the electrical connector from the wiper motor. Take a picture or make a note of how the wires are connected before disconnecting to aid reassembly.
4. Remove the Wiper Arm: There's usually a nut holding the wiper arm to the motor shaft. Remove this nut, and the arm should come off. Sometimes there's a mechanism to release the arm. Your repair manual will explain this.
5. Remove the Wiper Motor Mounting: The motor itself will likely be secured with bolts or screws. Unscrew these and remove the motor.
6. Install the New Motor: Reverse the removal steps to install the new motor. Make sure the motor is properly seated and secured.
7. Reconnect Electrical Connections: Carefully reconnect the electrical connector to the new motor, ensuring a secure connection.
8. Reattach the Wiper Arm: Reattach the wiper arm to the new motor's shaft, tightening the nut securely but not over-tightening.
9. Reassemble Interior Trim: Put everything back together, ensuring all panels and clips are properly secured.
10. Reconnect the Battery: Reconnect the positive (+) terminal to the battery.
11. Test the Wiper: Turn on the rear wiper to ensure it's working correctly.
Cost:
The cost of replacing a rear wiper motor on a 1998 GMC Jimmy will vary considerably depending on several factors:
* The cost of the new motor: Prices range from $30 to $100+ depending on the brand (OEM vs. aftermarket) and where you buy it (auto parts store, online retailer).
* Labor costs (if you have it professionally done): This can add $50-$100 or more to the total cost.
* Additional parts: You might need to replace other parts if they're damaged during removal or are worn out.
Recommendation: Before buying a new motor, check the fuse and wiring first. A simple fuse or wiring issue could be the problem, saving you the cost and work of replacing the motor. Using a repair manual specific to your vehicle model is highly recommended to avoid damage to your vehicle and for a smoother repair process.
