I don't know why I'm even starting this thread, just been thinking about it today, and thought I'd throw it on here and see what people think.
When you are welding you are dealing with a lot of electricity. With sensitive electronics, bad things can happen.
My thoughts stem from the recommendation to disconnect the battery before welding. That certainly isn't a bad practice and I'm not telling anyone they shouldn't disconnect the battery. However, I don't see how it does much to prevent damage to other electronics.
If you are welding on the body or frame of a vehicle, even with the battery disconnected, all the sensitive electronics are still connected through grounding to the body and frame. While the battery may no longer be in the circuit, the battery voltage isn't the problem, it's the possible errant voltage, frequency and RF from the welder that is the issue. Having the battery out of the system seems of little use.
Now, the exception to this could be if a stray surge from the welder caused and errant circuit to momentarily activate in a piece of electronics, at which time the available battery voltage is what would cause the damage. As I said, it's definitely not a bad practice. I just don't see how it greatly mitigates danger to electronics. If I'm wrong, awesome, I want to learn something, school me.
At my job, the equipment I work on often has a notice that all sensitive components should be disconnected before any welding. And indeed, my practice is to disconnect all electronic components if at all possible. This would be far less practical in a Jeep or other automobile because of the huge number of electronics, but I just wondered what others on here thought.
So what do you think, does disconnecting the battery alone give you a warm fuzzy feeling when you weld on your Jeep? Or do you cry a little because you wanted to disconnect everything (but didn't because it would suck and be virtually impossible)? By the way, I will likely be in the latter category when I weld something on my Jeep, haha.
Last edited by BigTB; 07-29-2015 at 05:42 PM.