1. Blown Fuse: Wiper fuses often provide power to both front and rear wipers, check your owner's manual for the location and amperage of the wiper fuse, check the fuse; replace it if necessary.
2. Faulty Wiper Motor: If the wiper motor fails, neither the front nor the rear wipers will work. Check the motor by connecting it directly to the car battery. If the motor does not run, replace it.
3. Defective Wiper Switch: The wiper switch controls the operation of the wipers. Check the switch by turning the ignition key to the "on" position and moving the wiper switch to different positions. If the wipers do not work in any switch position, replace the switch.
4. Damaged Wiring: Inspect the wiring that runs from the wiper motor to the wiper switch. Look for any breaks, cuts, or loose connections. Repair any damaged wiring.
5. Bad Ground: Ensure the wiper motor and switch have good ground connections; clean any corroded or loose ground points.
6. Faulty Relay: Some vehicles use relays to control wiper functions. Check the wiper relay; replace it if necessary.
7. Wipers Parked: Check if the wipers are in their 'Parked' position. In some vehicles, the wiper motor requires a 'reset' if the wipers have been moved manually while they're parked. Turning the ignition On/Off and operating the wipers a few times may resolve the issue.
