Hey all, I have to do some welding on the frame of my Discovery II. Other than disconnecting the battery is there anything else that I should disconnect?

 

Yes disconnect your alternator and your ECU,

 

I have done some extensive welding to my frame & have never disconnected anything aside removing the battery.

I think once I disconnected the ground to the block.. and forgot. Took me a day or two to figure out why it wouldn’t start.

 

its easier to disconnect than find out after completing the job you have a problem, like a fried ECU your choice

 

The best thing you can do while welding...is keep the ground as close/clean/secure to the area that you're welding as possible. It keeps the "path" short. Usually, where folks run into problems, they connect the ground to a spot they've cleaned/ground down to exposed steel...then jump around welding all over the frame. Next thing you know, the battery ground cable becomes a secondary ground route and the welder uses that "path" instead of welder ground lead. Plus, the closer you keep your ground to work area, the better the penetration you'll get. Plus, keeping the ground "path" close...helps keep you from becoming a ground path.

l've probably welding on hundreds of vehicles over my forty years...and never disconnected battery ground or ECU...and have never smoked one.

Actually, l've only seen it once. But, the guy did exactly what l described. Clamped ground to steel front bumper and started welding behind drivers door. ECU bit the dust.

 

Thanks so much, it was a big Help!