Welding on an Road Master Frame

[Frank McElroy]

I'm sure this debate will rage on but there is a difference between recommendations from OEM electronic manufactures who say disconnect all their equipment and the practicality of how to properly setup for welding on a vehicle.

Sure, it would be nice to have every electronic device (Engine, Transmission, Bendix ABS, Aladdin, Intelitec multiplex, Kongsberg front and rear CCMs, inverter, and all AC appliances) disconnected. 

Then there is the simple fact of reality.  Unplug from shore power, remove the solar fuses (if you have solar) and disconnect all the batteries. 

Then wire wheel to have a solid ground connection as close to the welding site as possible and then proceed with welding the component.  I've done it this way on cars and my coach for years.

The OEM manufacturers are trying to protect their computers from a very inexperienced welder who is welding on say a chassis frame member but connecting the ground to the engine block.  Yep, that will brick lots of computers!