Welding on the XJ question.

is this all i need to unplug before beginning a welding job on the XJ OR should i pull the fuses too?

 

[theory] As long as you have a good ground, there's no reason for the current from the welder to go anywhere but back out the ground clamp. So really, there's no need to disconnect anything. [/theory]

I've personally tested this theory on many vehicles newer than this, with far more, and more sensitive, electronics. I've never seen, or heard a first-hand account of, anything being damaged by properly welding on a frame.

Nothing wrong with being safe rather than risking it, though. Why not just disconnect the battery and remove any chance of anything having a complete circuit?

 

Thanks, I went ahead and disconnected all the fuses, both coils and battery.

 

Will second this.. Yes you can weld on it but why take chances on an almost 30 year old electronics to be the same after a possible jolt. its easier to unplug batteries(one screw), coils(two connectors), fuses(all 4 of em if you like) and the ignitor (two connections)....
good question is how long would it take for you to find those parts on ebay if they were to get fried???

Sean

 

I unplugged all my electronics as well as pulled my positive and negative cable better safe then sorry. I always keep the ground for the welder really clpse to the weld also .

 

disconnect the battery at least, and connect the cables.

i have seen a couple several thousand dollar ECM's cook when a truck was being welded on. also i once had to bring a friend out to the junkyard to get an ECM after he was welding his exhaust, with the clamp immediately next to the weld.

better safe than sorry.

 

I will also encourage caution, the TCI does not like transient spikes...