What do I need to check windshield wipers will not work

You will need 1) circuit diagram and description of operation 2) Test equipment such as volt/ohmmeter 3)PATIENCE Perhaps , more description of what happened.

Check the fuse first, most of the time it will be a issue with the switch, try it on all different settings and see if you can get it to respond at all, from the outside of the car listen towards the lower part of the windshield and reach in and turn them on and off and see if you can hear anything