1. Blown Fuse: Check the rear wiper fuse in the fuse box. Replace it if it's blown.
2. Faulty Motor: If the fuse is intact, the motor itself might be faulty. Look for signs of damage or corrosion. You may need to replace the wiper motor.
3. Damaged Linkage: The linkage connecting the motor to the wiper arm could be damaged or disconnected. Inspect it and reconnect if necessary.
4. Worn-out Wiper Blade: A worn-out or damaged wiper blade can cause poor wiping performance. Replace the wiper if it's worn.
5. Blocked Nozzles: If the wiper fluid is not spraying onto the windshield, check the nozzles for clogs or blockages. Clear them using a fine needle or compressed air.
6. Electrical Issues: There might be a problem with the wiring or electrical connection to the rear wiper. Check for loose connections or damaged wires.
7. Faulty Switch: The rear wiper switch on the dashboard might be faulty. Try operating the switch to see if it's making proper contact.
8. Software Issue: In modern vehicles, the rear wiper operation might be controlled by software or electronic modules. If there's a software glitch or module malfunction, it could affect the wiper's functionality. Consider updating the vehicle's software or consulting with a qualified mechanic/dealership.
If you're unsure about any of these steps or the problem persists, it's best to seek assistance from a professional mechanic or automotive repair service.
