Wipers, radio, gauges don't work

You will need a wiring diagram to help you find the problem or it will be a long and difficult time finding the open in that circuit. ( Not impossible but harder without the diagram)First check ALL fuses to make sure they are good. Second you will need a 12 volt test lamp or meter to trouble shoot. Trace the circuit from the ignition switch first if you have power leaving the switch then the open is after the ignition switch. If no power leaving the switch then it is before the switch so you will have to make your way back toward the power supply.
Good luck :)