Sprinter won't go over 30mph + All of the warning lights blink

[FleetTech]

I work at a truck shop that does a lot of fleet maintenance and repair on Sprinters. This one seems to be in limp mode with all of the warning lights on the dash flashing. None of the warning lights stay on and I can't pull any codes. Please Help!
(I will whenever possible)

[FleetTech]

My mistake. I was trying to help another mechanic I work with. He's to lazy and stupid to figure this out. So I started over.

I pulled several active CAN Bus Failure codes for every control module in the truck. I took the grill and headlights out and checked the CAN wires for shorts in the trouble spots and didn't find any. I took the instrument cluster out and disconnected it. I used the DRBIII to pull codes again and the only active one is TCM CAN Bus failure code. I checked the resistance in the CAN- and CAN+ wires from the IC connector. One is below 50ohms. I checked for a short to voltage and got less than 3 volts. So I started unplugging control modules one at a time and then checking the resistance in the CAN wires. The resistance stayed below 50 Ohms until I unplugged the TCM and the readings disappeared completely.?

With all of the control modules unhooked, I found where all of the CAN- and CAN+ wires are connected (spliced) together (under the driver's seat). I took the connecter covers off and tested for continuity between CAN- and CAN+ to see if they are shorted together. No continuity. I checked for continuity between the main CAN- / CAN+ splices to ground, no continuity so no shorts to ground. I then checked continuity between the main splices and the individual controller connectors. No problems.

I plugged all of the control modules back in except the TCM and turned the ignition on. All of the warning lights stopped flashing when I did this.
I'm going to replace the Transmission Control Module.