dustyinthedirt Posted February 1, 2017 Share Posted February 1, 2017 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. Link to comment Share on other sites More sharing options...
Marine1Texas Posted February 1, 2017 Share Posted February 1, 2017 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. Link to comment Share on other sites More sharing options...
dustyinthedirt Posted February 2, 2017 Author Share Posted February 2, 2017 I will be using a MIG to do this. Link to comment Share on other sites More sharing options...
mikekaz1 Posted February 2, 2017 Share Posted February 2, 2017 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. Link to comment Share on other sites More sharing options...
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