Final answer:
Tech A is correct about disconnecting the negative battery cable to disable the air bag system, as it is a standard safety procedure. Tech B is incorrect about using a self-powered test light to test air bag system components, as it could accidentally deploy the airbags. Proper tools and procedures must be used to safely diagnose airbag systems.
Step-by-step explanation:
Tech A says that disconnecting the negative battery cable may be required to disable the air bag system. Tech B says that a self-powered test light can be used to test air bag system components. In this scenario, Tech A is correct because one of the standard safety procedures before performing any repairs on a vehicle's electrical system, especially when it involves the supplemental restraint system (SRS), is to disconnect the battery. Usually, the negative battery cable is detached to interrupt the electrical power, which minimizes the risk of accidental deployment of the airbags. It is essential to refer to the vehicle's service manual for specific instructions, as some systems may have backup power that also needs to be safely discharged.
Tech B's statement about using a self-powered test light to test air bag system components is incorrect and potentially dangerous. The airbag system is very sensitive to electrical charges and using a test light can trigger an accidental deployment. Instead, specific tools and procedures are designed for safe diagnostics of the airbag system without causing unintended activation. It's recommended to use a specialized diagnostic scan tool for this job, as it communicates directly with the vehicle's airbag control module to assess the status and report any fault codes.
When working with airbag systems, it is critical to prioritize safety and use the proper tools and methods to prevent injuries and ensure that the system functions correctly when needed. Both technicians' experience and the manufacturer's guidelines should guide any inspection or repair of the airbag system.