Get a piece of gas pipe that will fit over the handle of your breaker bar. I have one that is about 4 feet long. It always wins.
Give me a lever long enough and I shall move the world," Archimedes
don't think for a moment that once we are used to paying the tariffs who ever is in charge next will just keep them. government loves nothing more than more money.
You said you put in a new battery are you sure it also isn't bad?
Try unplugging the ECU cleaning the connectors if necessary and plugging it back in
You aren't going to find a new wiring harness you will have to pull one off a wrecked car or repair the one you have