Quote Originally Posted by Nick
OK, so we finally managed to read the check light on the TOD by using a piece of wire. It's showing code 13 but where do we go from here? Thanks for all your help so far.
So, that means that "The reference is short-circuited to GND". Here are guidelines from the manual (note, that it is US version of TOD, but I think they are mostly the same, though the pins could be different):