I have a 1975 Plymouth Duster 360 automatic with a column shifter. I've recently gotten the car running again and noticed some of the light bulbs in the instrument cluster weren't working. I took the cluster out, replaced the bulbs, and put it back together again. When I tried to restart, I got absolutely nothing. The horn won't even work now. It was already having an issue starting every time I tried to turn it over (sometimes working perfectly, other times nothing). I've looked at the wiring under the dash but am at a loss for why I'm now getting no response. The voltage is fine at the battery and fire wall. Any suggestions on what I messed up?