It seems strange that a wiring harness could be damaged from stray welding current. I could see if the harness itself became the ground for the weld current... Highly unlikely.
Or if the lift were being showered with hot weld splatter that could land on a harness, burn through, short something out... More likely.
But disconnecting the battery would have no bearing on either. Disconnecting the battery would prevent immediate damage to a circuit board if the harness were shorted, but as soon as the battery were reconnected, the damage would still occur.
Guess I've been lucky, never damaged any electrical components by welding near them. I did set a forklift on fire once, welding sparks went down inside where the nasty oily stuff was. I caught it before any damage though.
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Today's Featured Article - What Oil Should I Use? - by Francis Robinson. I keep seein this question pop up over and over again in discussion groups all over the web. As with many things there are often several right answers and a few wrong ones. Some purist I'm sure will disagree to no end with what I will tell you but most of us out here in the real world don't really care do we ? Some of them only bring their noses down out of the air long enough to look down them anyway. If you are like me you are only doing this old tractor stuff because you enjoy it. You
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