Will welding on your car damage your battery?

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SomeGuy tests the myth of "disconnecting" the battery before welding on a vehicle? Is it true that an electrical welder will pass a surplus of power strong enough to surge and damage electrical circuits or just an old welders tale?
NOTE While not all welders use electricity in the forging process, and those that do not would obviously have no direct electrical threat to the computer components of your vehicle. This process known as ARC welding typically mig, tig and flux core. This video is addressing the internet "myth" (true or false I am addressing it as a myth or a legend) that if you weld on your vehicle without disconnecting the battery it will fry various electrical components.
Find out today when we possibly sacrifice out fog lights for SCIENCE with our Harbor Freight - Chicago electric 110 welder.
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Опубликовано:

12 дек 2021

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Комментарии : 24

@damiengibson2630 Год назад

The alternator I ruined by welding a ford transit says different

@Bmanreptileland 9 месяцев назад

I like the catch phrase anybody can do almost anything especially if somone else did it

@shawndubay4050 21 день назад

That's interesting. So I have to do some welding on a zero turn mower. The exhaust is cracked in a few different places and I need to weld them back. My question is would you pull the battery and pull the fuses from the electrical system?? Or would you remove the whole exhaust system as much as that would be a pain?

@adairjanney7109 20 дней назад

I would def disconnect the battery, just because its been fine so far, its about the voltage difference

@BikersYFans 2 месяца назад

a friends jeep will not charge the battery after welding the chassis, did not disconnect battery, it's newer jeep with a generator and electric assist battery, still can't figure out whats the problem with it!

@yourlocalalexis4578 2 года назад

i would rather be safe than sorry, especially working on a customer's car! It could be costly, lol!

@SomeGuyOutside 2 года назад

Yes it could be and I will admit I am still pulling the battery cable off, better safe than sorry 🤷🏼

@InverJaze Год назад

Good practise to disconnect the battery and alternator sense lead and charging + wires. I had welding done on my Mercedes SLK at a workshop, it killed the alternator and the Locks controller needed to be replaced and a new one reprogrammed. (£1200) I later welded the front wing with oxy-gas welding which has no electronic issues.

@SomeGuyOutside 11 месяцев назад

I have heard alot of stories like that, I haven't put any more time into recently but I would like to make a video proving it (short of just welding directly to a CPU.

@BearBudgetTurbine 4 месяца назад

Its best to be safe, but guilty of flux welding with battery connected. No damage ensued. Vehicles were trucks. 10 to 15 years old.

@MrPGT Год назад

On most cars, the body metalwork is also used as the negative "wire" to the battery for all of your electrics. So not disconnecting the battery means feeding the welding current to the battery and through to the cars electronics. Your led was not an equivalent test. Keep on disconnecting the battery in the future. Electric vehicles could have even worse problems, depending on the wiring scheme.

@Asky_ Год назад

The current takes the path of least resistance. Why do you think it needs to travel trough the whole electrical system and/or battery so it can reach the welder's negative (or positive) clamp??

@ifell3 Год назад

@@Asky_ what he said

@tonydelgado-aguilar348 2 года назад

Brotha where have you been it’s Tony

@tonydelgado-aguilar348 2 года назад

From airport haha

@SomeGuyOutside 2 года назад

I been around!

@johnb456 8 месяцев назад

I just burnt up a truck at work by not disconnecting the battery. It’s not a myth sadly

@SomeGuyOutside 8 месяцев назад

I still disconnect the battery just from the amount of people who’ve had problems from it

@legion4842 2 года назад

disconnected battery, wielded on the tail pipe. still screwed up the circuit..

@SomeGuyOutside 2 года назад

I still pull the battery cables off every time I am welding, old habbits. I have been working on another test to see if I can "determine" where the circuit is coming from but no different results so far!

@officialWWM 2 года назад

I would have thought this was a simple yes or no question 🤔

@SomeGuyOutside 2 года назад

Most people on the internet have an opinion on it, one way or the other. I have read some posts and seen videos of people saying "Ive done it this way for years without problem" but I wanted to see if I could visualize any evidence. I was expecting the answer of "yes it does cause damage" as I have always been the disconnect the battery type of person.

@officialWWM 2 года назад

@@SomeGuyOutside Fair enough.

@adairjanney7109 20 дней назад

sigh no its not the key you didnt even do a real test, your welder CREATES a voltage, your battery is 12v, if your welder is a different voltage it will cause a short, sure you might be far enough away that it doesnt do much, but everytime you dont disconnect the battery you take the risk of a short happening, best to just disconnect the battery