Sorry about the formatting, I tried to use punctuation. I only have a stick welder and a Mig machine but I am worried about the TCU and any other electronics in there. Is there a possibility of frying anything. Thanks. Oh its a Dodge Ram 5-45.
No man, that's ok. I absolutely understand your frustration. That's a tough repair!
I've zapped nuts on studs with MIG and stick. Stick works surprisingly well. On the Ford 5.4 engines I've done head studs on, I've disconnected the battery as a precaution.
I have used two car batteries using 7018 3/32" rod to repair Jeeps out in Moab. I disconnected the battery in those cases too. In the time I owned a shop, I've never had any computer issues as the result of welding repairs.