[Gmecm] Welding vs. computers

[bcroe at juno.com]

I second that.  Completely disconnect delicate electronics 
before welding.  A car isn't one mass of metal.  Many parts 
are isolated by rubber,etc.  So things like ground straps and 
exhaust pipes may be taking big currents, which aren't so 
predictable.  Not only the resistance is a factor, but the arcing 
weld current will respond to inductance in the circuit.  If the 
original ground system isn't in perfect condition, currents have 
been known to find their way through things like shift cables.  

Do tie your welding ground to the piece of metal being 
welded, reasonably close to the weld.  If there are 2 pieces, 
tie them electrically together.  

Bruce Roe

12 Nov 2006  Rexdina at aol.com writes:
> The fact is that while electricity does seek the path of least  
> resistance, 
> not all of the current is going to necessarily do that. Some of it  
> can go 
> through any of the numerous paths to ground. Best to disconnect or  
> entirely 
> remove potential sensitive electronic components. Yes, it's a 
> hassle,  but so is 
> trying to find out what is "cooked" when you do ruin one. And it can 
>  get 
> expensive.
> Harry