1. Fuses: Check the fuse box (usually under the hood or under the dash) for blown fuses related to the wipers. Your owner's manual will show you the fuse layout and which fuse(s) control the wipers.
2. Wiper Motor: The wiper motor itself could be faulty. This requires a bit more mechanical knowledge to check. You'd likely need to access the motor (usually under the hood, near the firewall) and test it directly with a multimeter or by applying power (carefully!). If you're not comfortable with this, take it to a mechanic.
3. Wiper Switch: The switch on the steering column might be broken. This is also something that can be tested with a multimeter, but again, it requires some electrical knowledge.
4. Wiper Linkage: The linkage that connects the motor to the wiper arms could be broken, rusted, or seized. Inspect this linkage for any obvious damage or stiffness. Sometimes a simple lubrication can resolve this.
5. Low Washer Fluid: While seemingly unrelated, if your washer fluid is low, this can sometimes affect the operation of the wipers, especially if there is a sensor or interlock system involved.
6. Electrical Connections: Check all the electrical connections related to the wiper system for corrosion or loose wires. This includes the connections at the motor, switch, and fuse box.
7. Relay (if applicable): Some vehicles use a relay to control the wiper motor. Check the relay (usually in the fuse box) for proper functioning. You might need to swap it with a known good relay to test.
Before you start:
* Try different wiper speeds: Does the intermittent setting work? Or only high speed? This can help isolate the problem.
* Listen for any clicking sounds: A clicking sound from the motor might indicate a problem with the motor or the power supply.
If you're not comfortable working on your car's electrical system, it's best to take it to a qualified mechanic for diagnosis and repair. Attempting to fix electrical problems without proper knowledge can be dangerous.
