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The TM must be wrong for the FMTVs if that's the case. The wiring diagram shows pin H on P110 (foldout 14 of 34 E122) coming from CB40 (foldout 17 of 34 C150) and the wiring diagram shows that as 24 volts. Also show 24 volts from that same CB40 setting pin M high (24V) for the configuration on...

Then the FMTV and 939 series ECU different? It's not how pins Z and M are connected? I would think that if the ECUs or vehicles are wired differently there would be a different connector. Back to the all lights on error... would configuring Z or M reset the memory?

Can you screen shot the "info" tab? Is there anything that talks about config or what configurations is set? There are 2 pins that set the config of the unit. On a side note is there a wire drawing of a 5 ton FMTV? I would like to see what config pins connected and how. Also is there an M939...

It looks like your software is using SAE J1708 protocol? That would explain why pins a and N have 1708... and pins D and A might be SAE J1939? I believe J1708 uses RS485 hardware to receive... Wouldn't think it would be too hard to make an adapter. Where did you get the software? Maybe a way to...

I mean a y cable for a NON c7 truck like mine. Does the dearborn III adapter talk to the whole truck, engine, trans, ABS CTIS ect... And got to ask what is a battle kill switch? and do you know your ECU part number...

Trying to figure out the pin out on the ECU and I have a question. On the "Y" cable drawing it shows pins Z and M as config 1 and config 2 and pin H as swign. Looking at the TM I see that pin M config 1 is jumpered to pin H "swign". The TM shows that pin H is 24 volts form CB40. The TM doesn't...

PLOT twist. Do you know the number for your ECU? I wonder if a y cable with work????

If I am getting an understanding the black ECU can be flashed or at least hooked up to a computer. I have not read anything about the green ECU being able to hook up to a computer. So in theory I guess you could take a black ECU and put it in a C7 truck. I don't know if this can be done with a...

Bummer. I think I read that you said all lights on steady is a corrupted memory. Is the memory Non-volatile or is there a battery for the memory? The reason I am asking is that if there's a battery I would not want to get an older replacement unit. Also is there a decoder for the date on the...

Are they potted or can you service the unit?

No and the batteries where disconnected...

So if I am reading this thread right all lights on steady is a bad ECU? It was working fine but I had removed the ECU to get the panel behind off. Putting everything back together and when I powered up all lights where flashing... when I started it up yesterday all lights where on steady. What...