During welding operations, what should be done with the ground cable or battery cables to protect the vehicle's computers?

During welding operations, what should be done with the ground cable or battery cables to protect the vehicle's computers?

• A. Disconnected
• B. Connected
• C. Shorted
• D. Insulated

Answer: (A)

Separating the vehicle’s electrical system from the welding circuit is essential to protect the electronics. Disconnecting the ground or battery cables stops welding current from finding a path through the car’s wiring, so the ECU and other computers can’t be hit by voltage spikes or stray currents. If the cables stayed connected, welding current could travel through power and sensor circuits, potentially damaging computers and blowing fuses. Shorting would create a dangerous fault, and insulating alone isn’t reliable enough to prevent current from finding a path. Disconnected is the safest and most effective approach.

Separating the vehicle’s electrical system from the welding circuit is essential to protect the electronics. Disconnecting the ground or battery cables stops welding current from finding a path through the car’s wiring, so the ECU and other computers can’t be hit by voltage spikes or stray currents. If the cables stayed connected, welding current could travel through power and sensor circuits, potentially damaging computers and blowing fuses. Shorting would create a dangerous fault, and insulating alone isn’t reliable enough to prevent current from finding a path. Disconnected is the safest and most effective approach.