I have a 1994 Ford E350 Cutaway Ambulance, that was converted to a small sleeper and flatbed?

Is there anyone that knows how to wire up the brake lights, turning lights, etc...... i basicly need a wireing diagram for the ambulance package that was there cause the guy i bought this from, messed up all the lights and i have so many wires that are just hanging inside and outside and in the engine, i need to know what they all goto or were spoce to goto or if there even spoce to be there. PLEASE HELP!!!!!!!! THANKS