Welding ?? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

wxman1 · 01-28-2003, 10:41 PM

I'm planning on doing some patching of floor panels inside
the cab. I think I read or heard somewhere that if you
performed any welding on a car body that you had to take
care not to damage any electronics because of the voltage
between the ground and the wire welder head.

Anybody know if there is any truth to this? 67-72 trucks
didn't come with much in the way of electronics, except for
distributors and in-dash radios.

Jim M.
Mt Juliet

bigvinnie · 01-28-2003, 11:15 PM

In normal conditions, there's no reason to worry, but Murphy's law is enough reason to disconnect the battery... it can't hurt..

bobs409 · 01-29-2003, 09:51 AM

I never disconnect the battery on any of mine while welding. (I probably would if I'd only remember too! LOL) No harms ever been done to mine yet.

They built 'em right back then, no worries of frying your computer.

Fred T · 01-29-2003, 10:01 AM

If you have a computer of MSD (or other brand) Ignition box you do need to disconnect the battery when welding. I have also been told of the MSD style boxes being destroyed when connecting battery chargers.

01-28-2003, 10:41 PM	#1
wxman1 Senior Member Join Date: May 2002 Location: mt juliet, tennessee, usa Posts: 237	Welding ?? I'm planning on doing some patching of floor panels inside the cab. I think I read or heard somewhere that if you performed any welding on a car body that you had to take care not to damage any electronics because of the voltage between the ground and the wire welder head. Anybody know if there is any truth to this? 67-72 trucks didn't come with much in the way of electronics, except for distributors and in-dash radios. Jim M. Mt Juliet

01-28-2003, 11:15 PM	#2
bigvinnie Registered User Join Date: Aug 2001 Location: escondido, ca 92026 Posts: 1,222	In normal conditions, there's no reason to worry, but Murphy's law is enough reason to disconnect the battery... it can't hurt.. __________________ '72 short step, 350, 700R4, tilt, ps, pdb, a/c, lowered coils, etc., other work in progress... San Diego, CA 72 Stepside Project

01-29-2003, 09:51 AM	#3
bobs409 1969 Custom 30 wrecker Join Date: Sep 2001 Location: Pottsville, Pa Posts: 2,611	I never disconnect the battery on any of mine while welding. (I probably would if I'd only remember too! LOL) No harms ever been done to mine yet. They built 'em right back then, no worries of frying your computer. __________________ Bob 63 Impala 283/PG/3.36 (under restoration) 66 Impala 327/PG/3.36 66 Chevelle SS 409/M22/3.55 69 Chevelle 307/PG/3.08 (future restoration) 69 C10 short stepside 454/TH350/3.73 69 Custom 30 tow truck 350/4 spd/4.10 (resto done, CRUISIN TIME!) 71 Cheyenne 20 fleetside 350/4 spd/4.10 71 Chevelle 6/PG/3.08 72 Chevelle 454/M21/4.10

01-29-2003, 10:01 AM	#4
Fred T Cantankerous Geezer Join Date: Aug 2002 Location: Bel Aire, KS Posts: 6,264	If you have a computer of MSD (or other brand) Ignition box you do need to disconnect the battery when welding. I have also been told of the MSD style boxes being destroyed when connecting battery chargers. __________________ Fred There is no such thing as too much cam...just not enough engine.



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