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
C12 Jake Brake
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by catman83, Jan 19, 2023.
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