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protecting the ECU during arc welding 200 1992

posted by  someone claiming to be Dharvey on  Wed Jan 15 15:20 CST 2003 [RELATED]

A month or two ago someone posted on the board that he needed to have some welding done on his vehicle and asked about how to protect the ECU.

Some said disconnect the battery, to depower the ECU and protect it from power surges. Some said, no--if you leave the system powered, the battery's 12v would "stabilize" the system against voltage spikes.

Well now I need to have a welding repair on my car. Hmmmmm. I asked an electrical engineer who was right. He said, just remove the ECU from the car and not to worry. He's not a motor head and didn't want to speculate on which of the other recommendations was correct.

Has a consensus on this developed in the meantime? I hate to mess with the ECU and its connector (AND the ICU and *its* connector?) unless that is the only safe solution. And if I take the car to a regular body shop, they might be willing to unhook the battery but I bet they won't be happy about waiting while I remove both computers before they do their work, and waiting again while I reinstall them.

Thanks for any help you can provide.

Doug Harvey






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