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Old 02-14-2003, 02:13 PM
Posts: n/a
Strange things can happen to electronics when welding. Shorting the positive battery cable to ground (joining the negative and positive terminals) puts all circuits at ground potential and eliminates the possibility of a ground loop circuit which can generate voltages higher than 12v in the different circuits. I always short the two battery positive /negatives leads together before welding. Have had no problem since doing that. Prior to doing it - I blew the voltage stabilizer on a VW - even though the positive cable was disconnected from the battery. For the time it takes - it's worth it. The other suggestion of keeping the welding ground close to the welding point is a MUST to keep stray currents from running through the body of the car.
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