Is there a diagram to show which fuses are for radio cigarette lighter side mirrors and reverse light?

Yes, most vehicle owner’s manuals include a fuse diagram that details which fuses correspond to various electrical components, including the radio, cigarette lighter, side mirrors, and reverse lights. Additionally, many fuse boxes have a diagram label on the cover indicating the specific fuses and their functions. If you can't find the manual, you might also check online for a PDF version or look for resources specific to your vehicle's make and model.