Street Mercy Movement

So I finally get a van to start up a new ministry here in Johnson City Tennessee. I find out it's got issues with the brakes the tail lights to Headlights I replaced the headlight switch that one problem I replace the brake light switch that wasn't a problem either I didn't put it all brand new fuses now I need somebody to help me locate the short there's either a short or a ground wire disconnected somewhere or I need to put it in the shop and pay $30 for a diagnostic