My new 71 Dart and the issues I am finding. Help needed please

okay, so i have spent the evening pulling out the seat and taking the AC vent loose. I tested the fuses and found two which did not register a voltage with the ohm meter. I also found some wires chewed by a mouse which I re-spliced and repaired. The radio wires were lying unconnected. The HVAC controls had a wire off of one of the pins also. (Im thinking the person who installed the radio knocked off) I will be looking for more tomorrow and also retesting the fuse panel. Im starting to see a common theme though. Anything that works off of the ignition switch is dead. (including all interior lights, wipers etc.) Now I need to find out why. (if it was a shitty radio wire job, tachometer job, or a mouse infestation, etc.) I ordered the wiring diagram as advised as well as the service manual. Some dip ran a wire out on the steering wheel to act as a horn button. I suspect that there may have been some tinkering in the steering wheel / column that might account for some of the trouble. I will keep you posted with what I run into tomorrow.

Thanks for all of the help folks.:wtf: