* Low-Fluid Sensor (Less Likely): While you've checked the fluid level, some cars have a faulty sensor that might be telling the system the tank is empty, even if it's not. This is less likely if *both* front and rear are out.
* Fuse: A blown fuse is a common culprit. Check your owner's manual to locate the fuse(s) for the washer pump(s). They might be separate fuses for front and rear, but a shared fuse is also possible.
* Pump(s): The washer pump(s) themselves could have failed. There's usually one pump for the front and sometimes a separate smaller one for the rear. These can burn out or become clogged.
* Wiring: A break or short in the wiring harness to the pump(s) is possible. This could be due to age, rodent damage, or a connection issue.
* Relay: Some systems use a relay to control the pump(s). A faulty relay can prevent the pump from receiving power.
* Switch: The switch you use to activate the washers could be broken internally. This is less common but possible.
* Multiple Issues: It's possible to have a combination of problems, such as a blown fuse *and* a failing pump, or a wiring issue causing the fault.
Troubleshooting Steps:
1. Check the Fuses: This is the easiest and quickest check. Replace any blown fuses.
2. Listen for the Pump: When you activate the washers, can you hear the pump motor running? If not, the pump or its power source is the problem.
3. Check the Wiring: Carefully inspect the wiring harness leading to the pump(s) for any visible damage, loose connections, or corrosion.
4. Check the Relay (if applicable): Consult your owner's manual or a wiring diagram to locate and test the relay. You might need a multimeter.
5. Test the Switch: If you have access to a wiring diagram, you could try testing the voltage at the switch to ensure it's sending power when activated.
6. Access the Pumps: If you're comfortable working on your car, you might be able to access the pumps to see if they're clogged or damaged. You can try tapping on them lightly to see if there's anything lodged in there.
If you're not comfortable performing these checks, take your car to a mechanic. It's usually a relatively inexpensive repair.
