Voltage problems, cutting out when hot

I’m sure this is my source of every problem...I apologize for not stating this from the start. The car has been starting so I didn’t give it a second thought until now...

Now where the Funk do I start????

I realize this is a complex system that is not easily eliminated without replacing the entire under dash harness and under hood wiring harness.

Again I’ve read in other postings that you can bypass the interlock system simply by making a jumper wire between the two yellow wires at the interlock reset button under the hood.
Obviously there is something more going on somewhere in this system.