If you have a Cascadia, Peterbilt, or other cab that communicates via J1939 at 500kHz and you want to replace its engine with an older one using computers like DDEC V, DDEC IV, or others that operate at 250kHz, you need to convert the data traveling from the engine computer to the cab so they can synchronize and all the gauges function correctly. To do this, using a 250kHz to 500kHz J1939 converter, you can lift the entire instrument panel to view every parameter in any cab. This requires no disconnection; simply connect the 250kHz ECM network to the converter, and then connect the converter's 500kHz output to the cab's 500kHz input on the Gateway.
Furthermore, if you also want to operate the switches via the Multiplexed CanBus network, you need the switch module that will allow you to send Grounds through the module's output pins or leave them open with high impedance so that your cruise control, PTO, engine brake, retarder, and others function correctly.
