Courtesy Light staying on/ Dash lights not working

Well, I'm still trying to run down this issue and wonder if it is the ignition switch. Here's the story. During restoration I put a new wiring harness on the car. I had everything working lights, courtesy lights, dash lights. But then, the dash lights started blowing the fuse. Thought it must be something jostled under the dash. But then, the courtesy lights no longer shut off.

So thought it was door switches, changed them no change.
Must be the headlight switch, Changed that, no change.

So diving under the dash Saturday but in the back of my mind I'm wondering if the ignition switch (which is original) is the problem.

1966 Barracuda


Any ideas or other things to check. The current plan is running one wire down at a time but I'm not positive how to check the ignition switch.

Help!!!