GTAW Welding repair to 91 Saturn

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I need to know if  what to disconnect to weld in spatches to the floor pan of our 91 Saturn.I don't need to blow out the computer or the alturnator else. Thanks
Reply:I disconnect nothing, but others will disagree with me.Make sure you have a good clean ground close to where you are welding.David Real world weldin.  When I grow up I want to be a tig weldor.
Reply:I weld on computerized vehicles every day no need to disconnect battery BUT as david r already stated keep ground close to work250DXMM251MM175225G plus 251D-1
Reply:I agree with David and Dedmetal. and have done just what they are saying. But when in doubt disconnect the battery at least, as I have done that too when the vehicles were not mine.Miller Thunderbolt 225Millermatic 130 XPLincoln HD 100 Forney C-5bt Arc welderPlasma Cutter Gianteach Cut40ACent Machinery Bandsaw Cent Machinery 16Speed Drill PressChicago Electric 130amp tig/90 ArcHobart 190 Mig spoolgun ready