Here's a general procedure. Always refer to your owner's manual if you have it. Specifics might vary slightly.
1. Disconnect the Battery: This is a crucial safety precaution to prevent accidental short circuits.
2. Locate the Wiper Arm Nut: The wiper arm is attached to the wiper transmission shaft via a nut. This nut is often hidden under a plastic cap or cover. You may need to carefully pry this cap off with a small flathead screwdriver.
3. Access the Nut: You might need to use a wrench or socket to remove the nut. The size will vary, but a common size is 10mm or 12mm. Use a socket wrench if possible for better control.
4. Loosen the Nut: Turn the nut counterclockwise (left). It might be quite tight due to rust or corrosion. Use penetrating oil (like PB Blaster) if needed, allowing it to sit for several minutes before attempting to loosen the nut.
5. Remove the Nut: Once loose, carefully remove the nut completely.
6. Remove the Wiper Arm: With the nut removed, the wiper arm should be able to be pulled straight up. It might take some force, but be gentle. You might need to wiggle it slightly to break free from any corrosion. Avoid hitting the windshield.
7. Clean the Wiper Spindle: Before installing new wiper arms or putting the old ones back, clean the wiper spindle carefully. Corrosion can make the arm difficult to reattach.
8. Reinstallation (if applicable): To re-install, simply reverse the steps, ensuring the nut is tightened securely.
Important Considerations:
* Rust and Corrosion: On a 1992 vehicle, rust and corrosion are likely. Penetrating oil is your friend. Be very patient. If you're having trouble, it's better to let the penetrating oil soak longer rather than applying excessive force.
* Wiper Arm Puller: In some cases, a special wiper arm puller tool might be necessary. These tools help to prevent damage to the wiper arm and the windshield.
* Windshield Damage: Take your time and be gentle to avoid scratching or cracking the windshield. Soft cloths or tape can help.
If you're uncomfortable performing this task yourself, it's best to take your vehicle to a qualified mechanic. They have the right tools and experience to do the job safely and efficiently.
