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Looking at your picture in the other post, there is a cable zip tied to the heavy +12 volt cable at battery post "1". The light gauge cable does not appear to have it's terminal connected to the battery lug. Smoking gun . . .

You also made a separate post here about the battery connections. Are you SURE all cables leading to vehicle loads are attached to the correct posts? If someone has been messing with these connections that was not trained (like a volunteer firefighter for example), it is quite possible things...

The VIM has fuses inside. VIM is Vehicle Interface Module, that is how the vehicle signals are made available to the transmission software. Some WTEC controllers are 24 volt, not sure about your A4, but I would think yes. So follow the work packages (WP) and you should be able to get to the...

Oh and that is not the right manual, you need TM9-2320-303-24-1 and -2. Download from JATonka website.

You have an Allison "world" electronic transmission. The controller and keypad must be powered and functioning in order for engine cranking to be enabled. The lack of lit keypad is the clue as to why your engine won't crank. Check the keypad and controller (follow harness) for connectors that...

If the Allison controller does not light up, it will not permit the engine to crank. You will need to determine why no power is available to the controller, or, it is possible the controller has failed. The transmission should default to neutral when unpowered. If the truck won't roll, it is...