6V92 OIL PRESSURE SENDER

[Itchintogo]

Found this in the Engine manual in the Document Library section. There is a ton of information there. If they broke your senders it should be easy enough to remove the ignition keys so no one can start the bus and remove your senders and take them your local Detroit or Heavy Truck shop and get two new ones. Not sure if they destroyed the wiring as well as your post was not clear on that. This schematic should help some though as it does show the two senders you speak of.