Where is the fuse for rear license plate on a 2000 Cadillac deville?

The 2000 Cadillac DeVille's rear license plate lights are typically fused with the taillights. Therefore, you won't find a separate fuse specifically for the license plate lights. Check the fuse box under the hood and inside the car (if equipped with one) for fuses related to the taillights or rear lamps. Your owner's manual will show you the fuse box diagrams, indicating which fuse controls the taillights. If a taillight fuse is blown, your license plate lights won't work either.