This is a noob question but I see people welding in cars all the time. roll cages etc. and I always wonder.

I have to tack on a couple of pieces to the radiator support for the radiator to sit on. My question is, do I have to remove the battery or fuse boxes or anything like that? i've always been confused as to how welding parts of a car affects the cars electrical system.

thanks guys.

 

Would it burn up the PCM?

 

just attach your ground to a good clean piece of steel and start welding.

nothing bad has ever happened to me or my car doing it like this.

 

Disconnect the Neg. terminal on the battery.

 

I always disconnect my ECU on my talon, but my ECU is damn expensive and im a bit **** about it. I disconnected the negative as well,

I've welded on other vehicles to do quick things when people are in a rush and don't bother disconnecting the battery or ecu, never seems to cause an issue.

 

just pull the ecu out for safe measure.

 

Thanks for the info guys.
I'm paranoid so I'll probably just undo everything. Just wanted to what everyone else does.