John == John Horobin < This e-mail address is being protected from spam bots, you need JavaScript enabled to view it writes:     John Just as a matter of interest - when welding on a car with a     John arc welder is it necessary to talk any steps to protect the     John electronic ignition and other electronic components.  Just     John wondering about any high voltage spikes which might occur? From the Land Rover workshop manual for my car: CAUTION: Always disconnect the vehicle battery before carrying out any electrical welding on a vehicle fitted with an SRS system. [airbag] All electronic control units must be disconnected before any welding operations take place It seems that if you should disconnect individual ECUs to be sure..... AndyC

From the Land Rover workshop manual for my car: CAUTION: Always disconnect the vehicle battery before carrying out any electrical welding on a vehicle fitted with an SRS system. [airbag] All electronic control units must be disconnected before any welding operations take place It seems that if you should disconnect individual ECUs to be sure..... This would certainly make sense. Purely disconnecting the battery won't help if some pranny welds through a wire somewhere.