right, number plate lights and dash lights are fed from fuse #20, check it again in case its blown since you replaced it. if it has, look for shorts in the wiring in the tailgate, as i say in particular at the rubber boots between the tailgate and body. the fuse gets power from pin 58 on the headlight switch, which is a grey/green wire. pin 58 on the switch runs to pin B27 on the back of the fusebox, whicvh then loops to B26 and finally A24, make sure all these wires are intact, A24 is where the power for the number plate lights and the dash lights comes from, so if either of these looped wires are dmagaed no power will get thru.