I need help.. not really familiar with dodge but I have 1994 Dodge Ram 2500 4x4 pickup.. I lost air conditioner on the face it runs on nothing but defrost. I found on the web where it may be a vacuum hose.. so I dug around and found a vacuum hose on the passenger side going through the firewall that had rub in two pieces.. My question is how do I replace this? How do I get the dash apart? Can someone explain for me? Thank you