Hi all, i just completed my convert to M1.3 on my preface lift 325i.
on the instrumental wiring saying that need to cut the 2 wire from the ecu plug and connect to old c104. i tried to connected the to the ecu plug without cutting it and nothing happened when i start the engine. the RPM is not moving. did i need to cut the 2 wires, totally disconnect from the ecu? PLS HELP.
