1. Wipers Not Working at All:
* Check the Fuses: Your owner's manual will show the fuse box location and the fuse(s) responsible for the wipers. Replace any blown fuses.
* Check the Wiper Motor: This is usually located under the hood, often near the base of the windshield. You might hear a clicking sound if the motor is faulty, or nothing at all. Testing the motor directly requires some electrical knowledge and a multimeter. If you're not comfortable with this, skip to professional help.
* Check the Wiper Switch: The switch itself could be faulty. This usually requires replacing the entire switch stalk.
* Check the Wiper Relay: The relay acts as a switch for the motor. This is a small component, often found in the fuse box or a separate relay center. Swapping it with a known good relay (if you have one) can help diagnose the issue.
* Check the Wiring: Inspect the wiring harness connecting the wiper motor, switch, and relay for any breaks, corrosion, or loose connections.
2. Wipers Working Intermittently:
* Check the Wiper Motor: Intermittent operation often suggests a motor problem, possibly due to worn brushes or internal issues.
* Check the Wiper Switch: A faulty switch can cause intermittent operation.
* Check the Wiring: Look for loose connections, corrosion, or breaks in the wiring harness.
* Check the Multi-Function Switch (If Equipped): Some vehicles have a multi-function switch that controls various functions, including the wipers. A problem here could cause intermittent behavior.
3. Wipers Moving Slowly or Erratically:
* Check the Wiper Motor: A weak motor will often result in slow or jerky wiper movement.
* Check the Wiper Arms and Blades: Bent arms, worn wiper blades, or debris buildup can cause erratic movement. Replace worn blades and inspect for bent or damaged arms.
* Check the Wiper Linkage: The linkage connects the motor to the arms. Inspect for rust, wear, or broken components. This is often the most complex part to repair.
4. Wipers Sticking:
* Clean the Windshield: Dirt, debris, and ice can cause sticking. Clean your windshield thoroughly.
* Check the Wiper Linkage: Check for binding or obstructions in the wiper linkage.
* Lubricate the Linkage (Use Caution): Apply a small amount of silicone-based lubricant to the wiper linkage pivot points. Avoid using petroleum-based lubricants as they can damage the rubber components.
Before You Begin:
* Disconnect the Battery Negative Terminal: This is crucial for safety to prevent electrical shocks.
* Consult a Repair Manual: A repair manual specific to your 1996 Pontiac Bonneville will provide detailed diagrams and instructions. You can find these online or at auto parts stores.
When to Call a Professional:
If you're not comfortable working on your car's electrical system or the wiper linkage, it's best to take your Bonneville to a qualified mechanic. Replacing the motor or linkage can be challenging, and incorrect repairs can lead to further damage.
