2007 international 9900i isx

Been chasing a problem for 3 weeks now. 2007 international 9900i with Cummins isx. Half of my gauges aren’t working. With key switch on, gauges will cycle then fall flat. Once truck is started the gauges peg out (oil pressure, coolant temp, rpm, speedometer and voltage. Also, Fan is running constantly, abs light is on. I’ve swapped out the abs module with one from a working truck. Disconnected all abs connections on front and rear axles. Swapped dash clusters. And replaced circuit breakers with fuses. I’ve also disconnected batteries and ecm plugs hoping to reset system. No DATA LINK. Swapped resisters around hoping it would trigger something.