I don't have the part number handy at the moment but they are listed in a CTIS thread I commented on over in the M939 forum...
For my M936A2 I built a "breakout harness" where I ordered the 24 pin male and females with socket soldered connections then patiently soldered them together wire by wire. During this process I broke out the power and J1939 by doubling up the wires and leading the extra over to a 9-pin diagnostic connector. I then used an STE/ICE kit cable and dearborn adapter that came with it to plug into a laptop and was able to talk to the system usign the Dana software. The STE/ICE kit was surplus and the cable pieces could all be found on different electronic warehouse sites like Mouser, Allied Electronics, etc...
I recently acquired a 1998 M1078 with non functioning CTIS. I had 5 flashing lights and it turns out the pressure transducer was shot. So a $20 one from Amazon plugged right in with the same plug and it started working. It promptly flattened all the tires. This happened when I got my M936A2. I have my work cut out for me.....
I tried to use the STE/ICE kit and my harness because this truck has the big round plug and I could use the comm box I got in the kit. It powers up but doesn't talk to the CTIS. I don't think the CTIS on the A0 trucks are wired to the diagnostic system on the truck. I need other software to talk to other parts of the truck. I know it's making a handshake I just don't know the truck well enough yet so I don't know exactly what it's trying to talk to.
I then tried plugging in my custom breakout harness and it won't power on the dearborn adapter. So I sat down and looked at the schematic and the pins for power and comms are different between the M939 series and FMTV. At some point I'll order another set of connectors and get to patiently making a breakout cable again. There is a lot of tiny little soldering and heat shrink and stuff to do it right. When I do that I'll try to remember to post up a little tutorial. Making a breakout harness is the only way to talk to the unit and reprogram as far as I can tell since it isn't connected to the rest of the truck diagnostic system. Just like my M936.
It might take a minute. My other truck taught me not to waste time with flattened tires and tons of time refilling them. I know now to start with wheel valve rebuilds, hub pressure tests, hub seals as needed (the M936 needed 4 done), and to work my way back to the PCU from there.....
