Tools You'll Likely Need:
* Socket set: Various sizes, including metric and possibly SAE.
* Ratchet and extensions: To reach difficult-to-access fasteners.
* Screwdrivers: Phillips and flathead, various sizes.
* Pliers: Needle-nose pliers might be helpful.
* Wrench(es): May be needed depending on the nut securing the wiper arm.
* Torque wrench: Essential for proper tightening of fasteners.
* Shop towels or rags: To keep things clean and dry.
* New wiper motor: Make sure you get the correct one for your 1999 Firebird.
* Possibly a helper: Some steps might be easier with an extra set of hands.
Procedure:
1. Disconnect the Battery: This is crucial to prevent accidental short circuits. Disconnect the negative (-) terminal first.
2. Remove Wiper Arms: This usually involves using a wiper arm puller tool (highly recommended to avoid damaging the arms). If you don't have one, you might be able to carefully pry them off using a sturdy flat-head screwdriver, but be very cautious to avoid scratching the windshield. Note the position of the arms before removal for correct re-installation.
3. Access the Wiper Motor: This is where the difficulty varies depending on the Firebird's trim level and body style. You will likely need to remove the cowl (the plastic panel under the windshield). This usually involves removing several screws and clips. Consult your repair manual for precise locations and removal procedures. Once the cowl is removed, you should have visual access to the wiper motor.
4. Disconnect Electrical Connections: Carefully disconnect the electrical connectors from the wiper motor. Take pictures or make notes to ensure correct reconnection later.
5. Remove the Wiper Motor Mounting Bolts: The motor is likely bolted to the cowl or firewall. Locate and remove these bolts.
6. Remove the Wiper Motor: Carefully remove the motor. There may be linkages or other components attached; disconnect them as needed.
7. Install the New Wiper Motor: Reverse the removal process to install the new motor. Make sure everything is properly seated and aligned.
8. Reconnect Electrical Connections: Carefully reconnect the electrical connectors, ensuring a secure fit.
9. Reinstall the Cowl: Reattach the cowl, making sure all screws and clips are properly fastened.
10. Reattach the Wiper Arms: Reattach the wiper arms in their original positions.
11. Reconnect the Battery: Reconnect the battery's negative (-) terminal.
12. Test the Wiper Motor: Turn on your wipers to ensure they are functioning correctly. If not, double-check all connections.
Important Notes:
* Repair Manual: A repair manual specific to your 1999 Firebird is invaluable. It will provide detailed diagrams and instructions.
* Safety First: Always disconnect the battery before working on any electrical components.
* Take Pictures: Taking pictures during disassembly will help you remember how everything goes back together.
* Patience: This is not a quick job. Take your time and be methodical.
If you're uncomfortable performing this repair yourself, it's best to take your Firebird to a qualified mechanic. Improper installation can lead to further damage or injury.
