Why should the vehicle battery be disconnected before electrical repairs?

• A. To prevent shock, short circuits, and airbag deployment
• B. To improve radio reception
• C. To facilitate faster refinish
• D. To reduce weight for painting

Answer: (A)

Disengaging the battery before electrical repairs is about safety and protecting the vehicle’s systems. The battery stores energy that can flow into circuits you’re working on, so if a tool creates a short or you accidentally strike a conductor, you could get an electric shock, cause a short that could blow fuses or start a fire, or trigger a safety system. In particular, airbags and related components are controlled by electrical signals; with power present, an accidental short or stray current could deploy an airbag, risking serious injury. Disconnecting the battery isolates the electrical system from power, reducing these hazards. After disconnecting, technicians may wait a moment to let any stored energy in capacitors discharge before handling airbag modules.

The other options don’t fit. Disconnecting the battery isn’t meant to improve radio reception, speed up refinishing, or reduce weight for painting.