Diagnosing Pontiac Grand Prix Windshield Wiper Arm Problems
Your Pontiac Grand Prix windshield wiper arm functions using a very simple mechanism. This device is a part of the wiper linkage assembly and is attached to the motor. It extends and retracts while it sweeps out dirt and water from your windshield. Perhaps, a wiper arm goes back and forth for about a thousand times, so don't be surprised when it falls off all of a sudden. At this point, all you can do is to find the culprit behind this problem to determine your next course of action-repair.
Wiper arm falls off completely.
If one day you just notice that your wiper arm is completely gone, there's only one thing that could have possibly happen-the nut and bolt came loose. Diagnosing this problem is very easy. You just need to inspect the linkages of the wiper arm. Replace any missing nut to secure the wiper arm in place. Don't forget the "other" wiper arm. Retighten its mounting bolts using pliers to prevent the arm from falling off, too.
Wiper arm moves very slowly.
Having a really slow-moving wiper arm is such a pain, especially during rainy and winter seasons. There are several reasons that can cause this scenario. First, you must check the return spring, pins, and joints for corrosion. Carefully pull the wiper arm to an upright position to see the small components clearly. If rust is present among these metal parts, you need to spray them with an all-purpose cleaner. Second, you must inspect the wiper blades for dirt. Dust and dirt debris hamper the movement of the wiper arm. Clean the blades to allow the wiper arms to move freely.
Wiper arm doesn't move at all.
You've already tried everything just to make your wiper arm work again, but you've failed. It only means that it's high time to replace them already. It's natural for your wiper arms to fail after they've been used for years. What you need to do in this case is to inspect the wiper arms thoroughly. A completely conked-out wiper arm looks extremely corroded up to its mounting bolts and pivot joints. Extremely corroded wiper arms are brittle, thus they break easily. There's no way for you to put it back into one piece. Installing a brand-new wiper arm is the best solution to this problem.