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  1. #1
    Join Date
    Mar 2011
    Location
    st-eustache qc.canada
    Posts
    245

    Default Vehicles electronics systems and welding...Have i been just lucky many many times?

    Last week i welded on some equipment i just installed on a F_250 super duty 2015 (YES 2015) and had no second thought about it, and no problem either.

    This morning i remembered things about battery isolators and other precautions, also heard the stories of nightmares about totaling ecm etc..

    Just read that 2008 thread here : http://www.millerwelds.com/resources...ng-on-my-truck

    Still not convinced about all these precautions.

    Common sense such as a good clean work clamp close to the weld seems to be enough for me. Thinking about service trucks that have welding tables attached to the bed, do they disconnect battery?

    Who has first hand experience with that?

    Are there some fancier welding process ( hf. ac balance, pulse etc...) that have higher risks to induce damages to ecu etc...?

  2. #2
    Join Date
    Aug 2012
    Location
    Hermiston Oregon
    Posts
    286

    Default

    From my experience. An electrical current always find the path of lease resistance. I don't disconnect my batteries either if I'm in the other end of the truck with the ground close to the weld area. But I always disconnect any customers battery. Just in case..
    .
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  3. #3
    Join Date
    Mar 2011
    Location
    st-eustache qc.canada
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    245

    Default

    thank's guys , 66+ views and only 2 opinions

    ecervantes who disconnects (chicken! ???)

    and me who does'nt...(idiot! ???)

  4. #4
    Join Date
    Dec 2013
    Location
    At the epicenter of the Green Mountain Range in VT
    Posts
    435

    Default

    Welder voltage would be destructive to electronic equipment. Therefore don't connect your ground clamp to an ECM, then lay your work on it to weld. Generally a ground clamp connected to the work piece should mean nearly no voltage through the electronics.

  5. #5
    Join Date
    Jan 2004
    Location
    Ohio
    Posts
    60

    Default Welding and grounding

    I've been welding for 34 yrs now and with the newer equipment out there with a lot of electronics it makes you wonder. I've done both unhooked the batteries sometimes and sometimes not. I have one customer with a ken worth dump truck that always unhook his batteries before I show up with the rig. One place I worked at required we double ground.we had a piece of weld cable 5 ft in length with a ground clamp on both ends, we attached the ground from the machine next to where we were welding and the double went right next to that ground and the other ex drove a ground rod in the ground and attached the other one to it. One thing that does come to mind is tig welding. High freq. will do strange things to electronics. So The best way today is to take the extra time to protect the electronics. Might be the difference of making money or losing your butt.
    Happy Welding
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  6. #6
    Join Date
    Oct 2007
    Location
    Cave Creek Az
    Posts
    1,055

    Default

    I haven't disconnected yet, and no troubles. Clean, shiny ground close to the work.

  7. #7
    Join Date
    Apr 2012
    Location
    Western Pa.
    Posts
    307

    Default Vehicles electronics systems and welding...Have i been just lucky many many times?

    Also welded many years, a lot of different equipment. Within last couple months welded on Vac. Truck and directional drill. Both have heavy electronics. Did disconnect battery's but felt that never eliminated risk. I've always thought bare metal, good ground, close to work and kept ground on main welding metal between weld & electronics. Also always started arc on ground side of metal when tacking & starting weld.
    Never thought of double ground. That is good idea. Maybe double ground both sides of weld area in high risk cases??

  8. #8
    Join Date
    Mar 2011
    Location
    st-eustache qc.canada
    Posts
    245

    Default

    Now the air bags :s...geee. we're walking on thin ice over a mine field!

    I plan to experiment on a car to be taken out to scrap, will try to blow everything that i can and post pics. first by welding with proper procedure and even with engine running but no disconnecting.

    Do you have suggestions for worse work clamp position ie. from muffler to weld on a fender, to battery ground lug, to remove battery and clamp the+ lug, i plan to mig stick and tig hf.

    It would be nice to hear from guys that had PERSONAL EXPERIENCE of any kind of incidents involving welding and current damage to systems.

    Hey cops! forget the spike strips, get a welder!
    Last edited by snowbird; 08-30-2014 at 06:59 AM.

  9. #9

    Default

    How long does it take to remove the battery cables, couple of minutes? If there's the slightest possibility of screwing something up why take a chance.
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  10. #10
    Join Date
    Dec 2011
    Posts
    430

    Default

    Quote Originally Posted by gnforge View Post
    Never thought of double ground. That is good idea. Maybe double ground both sides of weld area in high risk cases??
    I'm not so sure it always is a good idea. By adding more grounds you could increase the possible paths for current that otherwise wouldn't exist. As in from anywhere on the vehicle to ground. If you were welding with an engine powered weld that is not connected to earth ground the only path to complete the circuit is via the work cable. If you were to add more grounds and are using a grounded welder like one plugged into your shop power you will have created multiple paths. No? It might be an idea for person safety but not for electronic safety.---Meltedmetal

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