To be certain:
1. Consult your owner's manual: This is the best source of information. It will have a diagram showing the fuse box layout and what each fuse protects.
2. Locate the underhood fuse block: It's usually a rectangular box near the battery.
3. Examine the fuse block diagram: This diagram, found on the inside of the fuse box lid, will show you which fuse is likely responsible for the rear wiper (often labeled as "Rear Wiper" or something similar, but might also be grouped with other rear window functions).
4. Check fuses visually: Even if you find the correct fuse(s), make sure to carefully inspect them for blown elements. A blown fuse will typically have a broken filament visible inside the glass window of the fuse.
5. If you can't find the fuse from the diagram: Consider seeking help from a qualified mechanic or an auto parts store. They have access to detailed wiring diagrams and can assist you with identifying the problem.
Remember to always disconnect the negative battery terminal before working with fuses or electrical components to prevent accidental shorts or damage.