To find the fuse:
1. Consult your vehicle's owner's manual: This is the most reliable source. The manual will have a fuse box diagram showing the location of all fuses and what each one protects. Look for a fuse labeled "washer," "windshield washer," "wash/wipe," or something similar.
2. Check the fuse boxes: Most vehicles have at least one fuse box, often located under the hood and another inside the passenger compartment (often under the dashboard or in the glove compartment). Examine the fuse box diagrams carefully.
3. Look for online resources: Search online for "[your car make and model] wiper washer fuse location." Many forums and websites dedicated to specific car models have this information readily available.
If you can't find the fuse using these methods, it's best to consult a qualified mechanic. They'll have the expertise to diagnose the problem accurately and safely. Don't attempt any electrical repairs yourself if you're not comfortable working with car electrical systems.