Need some help with diagnosing my car. Young guy learning

is it possible for my ignition module connector to be the culprit? had a buddy sit in the car while i wiggled some wires around and i played with the ignition module connector and the lights turned on for a few seconds as well as the radio. also would like to add that i replaced the ballast resistor and the voltage regulator.
Tells me you need to take bulkhead connector apart and clean it. There may be melted connectors too.
You need to do a search on bulkhead connector repair, as i cant offer much info on procedure as i am not familiar with your type of connector.
All i can say is it will be brittle so proceed carefully.