fuse questions

I've noticed in the last month that both my cigarette adapter and my reverse lights are not working. (1997 B-2300 pickup) I imagine they are fuse problems, but I don't have the manual to tell me which ones to replace. Anyone have the fuse numbers or other suggestions? Thanks!

If you open up your fuse panel, sometimes they are labelled. If not, you can simply pull out the fuses, and look at them closely to see if they are burnt out or not