Tools You'll Likely Need:
* Socket set: Various sizes, including metric.
* Screwdrivers: Phillips and flathead, likely both.
* Panel removal tools: To avoid scratching the interior trim. Plastic pry tools are best.
* New power window motor: Ensure you get the correct part number for your driver's side.
* Possibly a window regulator: Damage to the regulator is common when a motor fails, so have a spare handy or be prepared to assess its condition.
* Wrench (possibly): Depending on the design, you might need a wrench for certain fasteners.
* Electrical connectors: If you're not confident, it's best to carefully unplug them.
* Shop rags or paper towels: To keep things clean.
Steps (General Outline – Consult Your Repair Manual!):
1. Disconnect the Battery: This is crucial to prevent electrical shorts and injury.
2. Remove the Door Panel: This usually involves removing screws located around the edges of the door panel. Use panel removal tools carefully to avoid breaking clips. There are often hidden screws under covers (armrest, etc.). Consult your repair manual for specific locations.
3. Assess the Window Mechanism: Once the door panel is off, you'll see the window regulator and motor assembly. Carefully inspect the regulator for damage; broken parts are often the cause of motor failure or contribute to its premature demise. A seized or damaged regulator will make replacing the motor pointless.
4. Disconnect the Electrical Connector: Carefully disconnect the electrical connector from the motor. Take a photo or make a note of how it connects if you're unsure.
5. Remove the Old Motor: This will involve removing screws or bolts securing the motor to the regulator. The exact method depends on your Alero's specific design. Your repair manual will be essential here.
6. Install the New Motor: Carefully install the new motor, ensuring it's correctly aligned and securely fastened.
7. Reconnect the Electrical Connector: Carefully reconnect the electrical connector to the new motor.
8. Reassemble Everything: Put the door panel back on, making sure all the clips and screws are properly secured. You can use a little silicone sealant on some of the clips to ensure a tight and secure fit.
9. Reconnect the Battery: Reconnect the battery terminals.
10. Test the Window: Operate the power window switch to ensure the new motor is working correctly.
Important Considerations:
* Repair Manual: This is absolutely vital. A general guide like this can't account for variations between vehicles.
* Safety: Always disconnect the battery before working on any electrical components.
* Damaged Regulator: If the regulator is damaged, replacing only the motor is a waste of time and money. Replace the regulator as well.
* Professional Help: If you're not comfortable working on your car, consider taking it to a qualified mechanic. The cost of repairs might be less than the potential damage from incorrect installation.
Remember, this is a general outline. Your 1999 Oldsmobile Alero's specific procedure will vary. Refer to a repair manual for your vehicle before attempting this repair. This will save you time, frustration, and potential damage to your car.
