Strange electrical issues with my '72 Dodge truck

I've had this truck a few years now and when I first got it I removed quite a bit of add-on wiring that previous owners had put in, I assume for powering stuff in their camper as that's what this truck spent most of its life as. One issue I still have though is if I go to crank the engine with the headlights on it instantly blows the fuse for the instrument panel lights.
OK , if this is automatic on the column, the orange wire in that harness connector comes down the column from that lamp, not ignition related. They just thought, there are extra ports in this connector, we'll poke the orange wire in it. The aftermarket ignition switches meant for one size fits all has a small black wire that will connect to the orange wire if you just plug it in as is. So to fix it, take the orange wire away from the switch connector. Use male and female spaded connectors to connect orange to orange. As many times as I have done this, I never checked to know if that extra little black wire is hot or ground. Bottom line... you dont need it. Leave it in the harness connector connecting to nothing on other side.