The dash lights do not work does anyone know what could cause this?

We tried the dimmer switch, that was not the problem, we do not have a manual, we have to order it was not in the truck when we got it.

plenty of used owners manuals on Ebay..you can buy a cheap test light for less than $10.00 and test every fuse on that vehicle in less than 5 minutes,key on,check both sides of each fuse>in and out..you do not need to remove the fuses..there are test points on top of each fuse,left and right side.