Dash lights not working

It seems like I have seen this alot on here, and I have did alot of searching the forums for topics on the matter, I have the same problem as alot of people and that is that my dash lights dont work, but my question was(because I am new to diagnosing electrical problems) how I can find out what/where the problem is with a multimeter or test light(if that is what I am supposed to use). I have been doing mechanics for a couple years now but I have never jumped into the electrical aspects of it, and this would greatly help me if you could give me help on how to troubleshoot it. I know the basics of a multimeter too, so Im all good with that, just all the different wires seem to overwhelm me.