unplugging ECU while wielding on a rocker?

[dustyinthedirt]

I am in the process of replacing a rocker panel. The battery is out of the truck already. I have already cut out the rot and am getting ready to start tacking. Do i need to unplug the ECU? I don't want to fry that thing. I will probably do it anyways. but would like to hear what other people say about it.

[Marine1Texas]

since it does not have any power to it at all no battery, you are safe. I have welded on my truck with battery, ecu plugged in with stereo on 2 separate times. I am assuming you are arc welder to ask this question! The power drop off is so fast since your probably have your Clamp with in a few feet of where your placing your Electrode. However if your worry then by all means unplug it.

[dustyinthedirt]

I will be using a MIG to do this. 

[mikekaz1]

FWIW, probably wrong for doing this, but I have never once unplugged my battery while welding on a vehicle.   and have not once ever have seen a failure or issue.  alternatively its always been on older (pre-2004) vehicles and not sure if this may/maynot be a benefit.