Before I retired, I was involved in lines of heavy manufacturing machinery, all with their own computers and all connected with conveyors. A main computer was linked to the computers on each machine and kept track of what they were doing.
Early in the development of these systems, before we learned better, we had a local welder make a change on one of the conveyors, which also was controlled by one of the computers.
We zapped the main computer.
I drive a Ford F350 and regularly pull a horse trailer.
Every time I need welding on the trailer, the welders completely disconnect the trailer from the truck and I mean completely; wiring, hitch, all of it.
Welding anything connected to a computer is not wise.