Speaking from experience my advise to you is to sell it as fast as you can, Its a money pit, that you will never solve, The engineers that designed all the electrical circuits must have been a Class A IDIOT,
You don't happen to have any links to the Youtube videos. My problem is on a 2007 95, it will not let Tech 2 reprogramme the brake size plus all lights on .Fairly common concern, first check codes. The p-bus runs through the esp(abs/tcs/esp) unit, if the board foil cracks you lose communication with ecm, T8 does not know you are trying to start the engine, usually intermittent. You tube video shows how to bypass esp at the connector, if needed bypass permanently joining the in and out p-bus wires together. (blue and white wires)