Hey guys, just swapped a cummins ism out for a cat c12. Truck is an international paystar. Everything in dash is working but can't seem to get the jake to work. If i put power on pin 10 of engine harness it will engage, so I know the jakes themselves are good, but I can't get the jake to engage on its own. Looking at the engine schematic it appears that cat uses a ground signal to ecm for jake, but is there anything else that could be different going from cummins to cat?
Thanks in advance
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