Hi all,
Thanks for the replies, as far as I can see all the fuses are OK and the converter is working (that was one of the first things I checked) I haven't checked if there is a 48 volt supply to the logic as I thought the logic would only need a 24 volt supply for truck doctor to connect. I am now not sure what is wrong, I have tried the logic on another truck and it works OK, and i tried my laptop on that truck with my logic and it still would only works when connected to the display (6x1) if I connect it to 1x2 or 2x5 the laptop will not connect unfortunately I didn't connect my laptop to the truck I tried the logic on with its original logic so there may still be a problem with my logic talking to truck doctor, I will go back to the faulty truck tomorrow see if I can find a problem with the wiring. The only thing I can think of is if the truck doctor I am using is not compatible with the age of truck I am trying to connect to, the truck doctorI am using is 2.00.008, any help would be appreciated