I was once told that welding on the frame/body, or any grounded part of a chassis, can negatively affect the ECM, battery, and/or Alternator.
I have been told to disconnect the battery, but never anything about the alternator and ECM.
Does anyone have any facts behind this?
I'm going to be welding some mounting points on my samurai tomorrow and don't want to fry anything.
I've welded on my mustangs and never hurt anything, but was always leary of it after I was told this.
Thanks in advance.
Shawn