Reply to " the only thing not plug and play was the wire that needed to be connected to the motherboard for the serial data signal. I soldered the wire on as per the position noted in the manual. "
Your symptoms kind of describes no serial data getting to cruise board. The serial wire from your ERR Cruise M board J4 connector needs to connect to serial connection (or equivalent) of the R2LC. How did you confirm you actually got on serial pin on the motherboard? See linked diagram for the R2LC board and it shows Pin 24 as serial which is opposite and across from Pin 1. The R2LC Pin 1 is unique because it has square solder pad. and all other pins are round. Find the corner pin on the R2LC board that is square (pin 1) and confirm you soldered to opposite and across (Pin 24) from that on your motherboard.