When welding on the Jeep or any other vehicle what precautions should be taken to protect the electrical system? Is there risk of frying anything?

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Early '02 Limited, Steel Blue, White Guts

Disconnect the battery(both terminals) since there is a possibility of frying the PCM,TCM,BCM,and may mess with the airbags.

I've heard that you want to completely top up the fuel tank to avoid the vapors potentially igniting. (top up the filler neck)

The science behind the logic: Gasoline doesn't burn, it's gasoline vapoir that actually ignites.
-Mark

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2008 VW Rabbit- 5-speed 5-cylinders
2000 TJ 4-cylinders 5-speed I'll let you know when I figure it out.
2006 Liberty SOLD.

Make sure you ground the vehicle really well. The welder I learned from would actually connect directly to an earth ground (metal rod stuck in ground) as well as the welders ground. Maybe overkill, but couldnt hurt I suppose.

Disconnect battery as mentioned, dont know about the fuel tank thing, but at least make sure you dont have a leak somewhere and proper ventilation as well.

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It may be that your only purpose in life is to serve as a warning to others.

06 CRD Sport
Built 5/11/06
Jeep Green
Rocklizard diff cover
V6 Airbox