2012 KW T660 CM2250 engine swap into 2008 Pete 389 CM871

[JimT]

(12-17-2019 )Lonestar10 Wrote:  There's 2 harness plugs on each ECM 1 is the Cummins engine harness the other is the OEM harness with other sensors and inputs from your oems installation parts this will have to be reworked and ECM and body controller will need to be reprogrammed to accept each other's inputs/outputs. Might be 3 plugs on 2250 ECM in that case I have no idea. Be better off selling the 2250 and doing a correct overhaul on 871 which is more reliable in the end

The 2250 does have 3 ECM plugs. 2 are Cummins, 1 is OEM. Probably needed more pins to accommodate all the extra SCR junk. The ECM on the 2250 is located on the bottom rear of the driver side above the starter.