Abs and engine shutdown light

I recently fixed issue on 01 Freightliner abs rear harness abs sensors. All is good until 5 min ago while stopped for coffee red engine light and red shutdown and buzzer and abs light all came on for 5 seconds and all went off. Tried to pull codes and shows nothing. Any ideas?

 

Maybe abs light going on is first sigh of bad ground? Then I lose ground or ? Completely. Truck shut down with no dash key on lights . Truck cranks all Other acc working not key on. Pulled fuse for ecm and shook wires around with key on. A minute later buzzer and dash lights came on started Truck and went back to TS. Trying to replicate problem all wires look good. Except 1 for power distribution module in fuse box. Gonna check if now

 

Cleaned all grounds found very little corrosion on negative cables and 2 wires for ecm near battery box. Problem fixed. Thanks everyone