What action should you take to prevent sudden activation of seatbelt tensioners?

What action should you take to prevent sudden activation of seatbelt tensioners?

• A. Disconnect the battery
• B. Cut the seatbelt
• C. Wait for activation
• D. Remove the harness

Answer: (B)

Disabling electrical power to the vehicle is the way to prevent seatbelt pretensioner deployment. Pretensioners are triggered by the vehicle’s electrical system, so removing power stops any potential activation during extrication. The safe approach is to disconnect the battery, typically removing the negative terminal first (then the positive if required by the procedure) and keeping it disconnected long enough for capacitors to discharge before you begin work. Cutting the seatbelt won’t reliably disable the system and can create additional risks or injuries, whereas removing power eliminates energy sources that could cause inadvertent deployment. Always follow the vehicle’s power-down procedure and ensure scene safety while the system is de-energized.

Disabling electrical power to the vehicle is the way to prevent seatbelt pretensioner deployment. Pretensioners are triggered by the vehicle’s electrical system, so removing power stops any potential activation during extrication. The safe approach is to disconnect the battery, typically removing the negative terminal first (then the positive if required by the procedure) and keeping it disconnected long enough for capacitors to discharge before you begin work. Cutting the seatbelt won’t reliably disable the system and can create additional risks or injuries, whereas removing power eliminates energy sources that could cause inadvertent deployment. Always follow the vehicle’s power-down procedure and ensure scene safety while the system is de-energized.