I have done this several times in my mopar life. First- remove steering column from car.Remove screws that hold fuse block to firewall. Photo or diagram wire plugs in fuse block. Unplug / label wire plug ins. Remove kick panels to expose 2 1/4" bolts that hold lower dash frame, loosen but dont remove. A pillars mouldings should be removed. Vent cables should be disconnected.(your choice at dash or heat control switch or fresh air duct ) Find 4 smaller screws in defrost area of dash. Support dash. Remove 4 screws , dash will pivot-roll away from firewall. Have a good flashlight available.Now you can remove entire dash and work on bench to rewire your dash.Not so bad......Good luck. Why did ampmeter wire melt?????