I currently am trying to instal ac in my truck, I so far have all the parts for the install. I have a newer A/C panel from possibly a 82 or so, it has the twist knob for fan speed and ac, my wiring harness has a 4 prong plug for fan switch, the new panel has 3 wires and main fan plug has 5 prongs. Also any tips on the electrical side of hooking up separate ac harness section?? Or anybody have any diagrams??? Can post pics

 

hit youtube if you haven't yet I'm sure someone covered the whole ac installation thing