Okay in my DT class we were "full fielding " the alternator as a diagnostic test. When we shut the bus off and tried to restart the engine the starter cables arked and wouldn't turn over at all. So we took the starter off and bench tested it. Tested good we re installed the starter an when going to hook it up we have 2 wires with no clue were they go . One leads to the manifold air pressure sensor I believe . The other I have no clue. There both red. With ring terminals on them. This brings me to the next problem the ECM will not power up at all the pro link reader won't even get a signal. So I checked the ECM and IDM fuses and relays they appear to be fine. The engine is a t444e international.