Tomberlin Vanish wont move

[rstacy]

The vehicle is a 2012 with 8 miles on it. Had it sold and while loading it on the truck all 8 of the batteries exploded. We did a lot of rinsing.
I installed new batteries. The thing ran great. We shut it off and about a week later tried to load it on the truck.
Turn the key on, the main solenoid closes. No lights or speedo read out. Nothing happens when pressing the accelerator.
Trace part of the problem down to the DC-DC converter being shorted. It also had a bad burnt smell.
I wired in an a mostly right aftermarket converter and powered it from 3 of the batteries while I wait for the closer to right converter to arrive.
With my temp converter I now have have lights and a speedo.
Still no response from the controller.
Do you think this is related to my temp converter and will be resolved when I put in the correct converter or are they separate circuits and I have some sort of controller issue? The barrel fuse by the controller is good and the solenoid is passing voltage.