My brother picked up a 1997 Thomas International 3800 School bus with a T444E in it. He bought it not running and is now trying to get it running. It will crank by jumpering the solenoid on the starter, but will not run. Does anyone know if the IDM on this is interchangable with the PowerStroke IDM? I'm thinking not, because I swapped it with the IDM in my 1997 F-250. Neither vehicle ran. I realize this test is not conclusive. But I do know that the Navistar IDM # 1807248C3 did not work in my F-250. It could be a bad IDM, but I suspect the no crank/start condition in the bus is due to some safety lock-out circuit. We're currently trying to track down a wiring diagram for this beast. This bus was used in the Oilsands and the underside of the bus is caked in mud. The starter had to be chipped out of the dried mud to replace it.