 | Home > Puma (Tdci) > Welding on a tdci |
 
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| ickle Member Since: 22 Jul 2010 Location: South Vendee Posts: 1820   
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I want to tack up a few mods with a mig welder, on my side steps and tow bar before I have them galved and re-coated.
Is disconnection of the battery enough to protect the electronics, or do the ecus have to be disconnected as well? Cheers Keith |
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10th May 2014 5:13pm |
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| JR Member Since: 07 Dec 2012 Location: Auchtermuchty Posts: 532  
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You don't have to disconnect the battery for Mig welders, only electric arc welders.
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10th May 2014 5:21pm |
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| ickle Member Since: 22 Jul 2010 Location: South Vendee Posts: 1820
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Whats a mig if not an arc welder??
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10th May 2014 5:27pm |
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| pob1968 Member Since: 20 Apr 2014 Location: uk Posts: 239 |
A mig welder is like an arc welder it just has its welding rod on a spool and shrouds the arc in gas to keep impurities to a minimum. Still an electric arc welder though. 110 Hardtop
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10th May 2014 7:12pm |
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| munch90 Member Since: 26 Oct 2013 Location: guildford Posts: 3558 
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you can get anti surge spike devices you put across the battery when welding
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10th May 2014 7:22pm |
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| T1G UP Member Since: 08 Dec 2009 Location: Bath Posts: 3101 
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personally i would disconnect any electronic devices...
TIG may be safe but the HF tends to kill most things.....but hey what do i know  |
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10th May 2014 7:32pm |
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| munch90 Member Since: 26 Oct 2013 Location: guildford Posts: 3558
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one thing is put earth lead for welder close to the bit your welding ,
current will take path of least resistance you don't want it going to far or through anything |
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10th May 2014 8:02pm |
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| big steve Member Since: 24 Dec 2009 Location: hertfordshire Posts: 2456  
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you might wish you had disconected it after your replacing the ecu ? 2015 2.2 tdci hardtop xs
3.2 conversion DONE 238bhp and 707nm torque and thats just the start ;-P hybrid turbo in build -done ready to fit ashcroft atb in transfer box 6 speed auto in build |
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10th May 2014 9:38pm |
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| martinfiattech Member Since: 13 Nov 2013 Location: leicester Posts: 422
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Disconnect the battery or get an anti spike thing.
Visteon ecus don`t like being spiked, had a few transits killed off just by jump starting and a few 2.2 puma ducatos go the same way. If your using a pair of mole grips while your welding look at what it does to the spring in them, especially if you use them as an earth 
H.F. in tig is fun to, I ran the cable over my back and it wiped my bank card in my back pocket, never happened with a mig or arc welder, did it that way so many times never a problem..... Excuse the spelling I`am better with spanners and wires. |
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10th May 2014 9:44pm |
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| AndrewS Member Since: 10 Apr 2007 Location: Hereford Posts: 3709 
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Done loads of 'tacking' bits onto loads of vehicles and never ever disconnected anything and never had an issue (so far).
Can someone explain why disconnecting the battery makes any difference  Surely disconnecting the sensitive components would be more important than the battery? |
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10th May 2014 9:52pm |
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| jomara Member Since: 26 Oct 2009 Location: Lanarkshire Posts: 1790 
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Better safe than sorry, I spiked the ignition module and electronic distributor on my Bowler tacking a seat bracket with a mig even with the ignition & kill switch off, expensive lesson!! 2014 110 2.2TDCi XS Station wagon
1971 Bowler Tomcat 88 4.2 V8 Auto 2022 110 D250 XS Edition - Gone 2024 110 D250 X-Dynamic HSE |
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10th May 2014 10:04pm |
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| munch90 Member Since: 26 Oct 2013 Location: guildford Posts: 3558
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this is a awkward one really , as no one will say it 100% ok because of "just in case"
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10th May 2014 10:09pm |
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| AndrewS Member Since: 10 Apr 2007 Location: Hereford Posts: 3709
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I have always fitted the earth to the items that are being welded thereby (in my head) it reduces the distance the electrics travel and in theory nothing else should get interfered with.
For instance lets say you were going to weld a patch to the exhaust pipe, clearly you clean a solid bit of the pipe or a bracket and fit the earth to that. Now if you were to carry out the same repair to the exhaust pipe and fit the earth clamp to lets say the radio aerial the current has to travel up the exhaust pipe through the engine earth straps into the wiring via the radio etc etc clearly this will cause issues. Will keeping the battery connected actually protect the sensitive components? in that it acts like a reservoir absorbing peaks? |
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10th May 2014 10:27pm |
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| mk1collector Member Since: 17 Sep 2009 Location: West Yorkshire Posts: 6772 
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Having been a panel beater for many years we always removed the earth strap to the battery or fitted a surge protector. I also know of a couple of times when people hadn't done this and fried the ecu! So my advise would be take the earth off the battery as it doesn't take long to put the radio code back in.
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11th May 2014 12:04am |
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