My SIL is a good guy and treats my daughter good. He can't back a trailer for crap, though. He put two nice dings in my truck so far, and I've had to repair two trailers.
He comes to me with his Yukon Denali. It has a small 4" x 4" plate where the plug plugs in that has somehow (?) been ripped off the bumper right along the original MIG welds.
No problem, sez I. Sez he, "Aren't you going to disconnect the battery so it doesn't foul up the computer?" I really don't think it's going to put any electricity into the system, and it's not welding near any computer type component, so I sez no. But, I tell him I'll check with the pros.
I've heard to disconnect the battery, and not to disconnect. When is it (is it) appropriate to disconnect?