Hopefully someone can shed some light on this for me. I have a nor30 with a serial of 2ml02012 that had a bad vehicle manager. Sent out to be rebuilt and came back and did work for a short time and then went bad with another code, sent back to be rebuilt again and they couldnt get it fixed so they pulled a vehicle manager out of a known working truck and sent to me. As soon as I installed in truck codes 12 as soon as key comes on. Refers to 24" and 60" switch not agreeing. Problem is the truck I have is only a 2 stage truck with only a 24" switch. Could the firmware be different between 2 stage and 3 stage trucks or do I have another problem?