Half Dead Flashcan V2

[ssvolvo]

Working on a LS1 for an old straw blower I am re-powering. I was cranking the starter motor and heard a loud crack and watched the V2 go up in smoke.
I opened her up and found it burned up a resistor or cap or something rather important smelling! I'm trying to figure out what went wrong because surely it will happen again, most likely because of my homemade wiring harness.

I am working with a 2000 LS1B ECM and serial data is on pin 2 of the OBD connector, I have no communication with this ECM but if I connect to 2007 LMM my Flashcan works perfectly most likely because CAN 6 and 14 are comms for that one.

I would like to solder in a new resistor or whatever it is. Can one of you good folks point in in the right direction I can buy from Mouser and I have a hot air soldering station that should do the trick. Or else a new unit is in the works. All of my licenses are in this thing.

Thank-You!

BURNT Fred, my shop stinks so badly of electronics failure.

Thanks for the help. Here's a picture as best I can.