have here on the bench a MSD81.2 from a E88.
now i'm trying to read the ISN from it but keep getting "can not communicate with ecu, check wireing and power supply".
have connect 13Volt 5A as power supply and wire connected as diagram from autohex.
22 yellow can high
44 orange can low
16 black Gnd (smal connector ecu)
2x red on pin 1big, 1smal (smal connector ecu).
can i get some help?