OK, finally got this resolved. Checked the ED contactor and it was burnt. Installed a new one and it would power up but has reverted back to the 367 code. So I went back to square one and rechecked my wiring, paying closer attention to my ohm readings. Found that the signal wire to access 3 was broken. No apparent damage on the outside but the copper inside had broken. Repaired the wire and it powered up and worked normally.
Thanks for all the help. I have convinced my boss to invest in a manual now.