back-up lights on 64 dart gt

can somebody help me with a problem I am having with my dart? the back-up lights are not working and I need them to get an inspection sticker to put car on the road. none of the fuses seem to be blown, but I am not sure which fuse it is. the bulbs are both brand new. I don't have an owners manual for the car yet, but I am planning on getting one, and it will be a while before I get it.