I purchased my 1970 Challenger in 2009. It sat 20 years in AZ desert before I got it. Yesterday I finally got to make some noise with it. It starts and runs fine. I put a 440 with 727 in it. I replaced the engine wire harness. I installed electronic ignition. I have a weird problem. The only time the ignition switch works is if I push any of the buttons on the AC/Heater control. If I push the off button, the ignition does not work. I have traced wires, everything looks really good under the dash. I don't see anything that has been spliced or messed with. Any ideas? Thanks.
