Here's the proper procedure:
1. Lift the wiper arm: Manually lift the wiper arm away from the windshield. You may need to slightly pry it up. It's usually held in place by a fairly simple mechanism.
2. Inspect the connection: Look closely at how the wiper arm attaches to the transmission. There's usually a nut (sometimes with a small cover) or a simple hook-like connection. *Don't force anything.* If you see significant wear or corrosion, that's the problem, not just looseness.
3. If it's a nut: If you see a nut, use a suitable wrench or socket to tighten it. *Do not overtighten*. A little snug is all it needs.
4. If it's a hook: These are less common on wiper arms, but if it's a hook mechanism, ensure it's properly seated onto the splined shaft and securely locked in place. If it slips easily, you may have a worn splined shaft or a problem with the wiper arm itself.
5. If it's still loose after tightening: The problem is likely *not* simply a loose nut. You probably have a worn wiper arm pivot, a damaged spline on the wiper transmission, or a broken wiper arm. You'll need to replace the faulty component. Replacing the wiper arm is usually simpler and cheaper than fixing the transmission.
Important Considerations:
* Safety First: Always disconnect the battery's negative terminal before working on anything electrical related to your vehicle, even wipers. This is a precaution to avoid accidental short circuits. However, it's not strictly necessary for simply tightening the wiper arms.
* Parts Replacement: If tightening doesn't solve the problem, you'll need to get replacement wiper arms or potentially the entire wiper transmission assembly from a parts store. Bring your VIN to ensure you get the right parts for your specific S-10 model.
* Professional Help: If you're uncomfortable working on your vehicle, take it to a mechanic. This is a relatively simple task, but if you're unsure, it's best to seek professional assistance.
Before starting, take a picture of the wiper arm connection to remind yourself how it goes back together. This will help you avoid confusion.
