TRK TRACT 6x6

Gentelman.

I have this 916 that has the pushbutton transmission module on it. The people that had it says that the tranmission did work but, now it will not shift or even go into gear. i put a computer on the 9 pin connector and the computer will not even read or see the TCM.
The TCM has power going to it and the light comes on but just flashes on the push button part of the shifter. I am trying to find a wiring diagram and maybe a little help with this problem. Thank you in advance.

Are you working on a Freightliner M916 or an AM General M916 that has the Allison added? Press up and down on the shifter and report back any codes that are displayed,

I am working on a Am Gerneral M916 and there is no codes that has poped up when i do this let me try this again thank you for your response

There were only a handful (20 maybe) of those trucks converted to the Allison. There is no documentation regarding the conversion. Make sure the controller (I think on the cab back wall) is getting power, there may be multiple feeds with both 12 and 24 volts, not sure.

No, you have bad connections. Disconnect all connectors, make sure all contacts are clean, treat with contact cleaner and reassemble with a product designed for electrical connections. Also look for wiring harness damage from rubbing on sheet metal. Disconnect batteries before doing anything.

Find someone local that fixes Allison Automatics. The parts on your truck are not military only.