NOTE: This is a Model MT55 NOT a Cascadia! I have a code 3597. I am using the Insight software but I do not have access to the harness Plug/Wiring diagram for the dosing unit control module. I believe I have power problems at the module but do not know what wires go where. The Freightliner has a separate fuse relay block with all the fuses and relays together that are part of the DEF SCR system and they are all good. It is a ISB 6.7 Cummins. Any help would be appreciated. VIN 4UZAARDU5CCBK9159

Joe Slone
Technician
PFM Car and Truck Center
Zionsville, Indiana, USA