Automotive Electronics Practice Test

In a discussion about fuse testing, who is correct if Technician A says a test light should only light on one side of the fuse if it is OK and Technician B says the fuse must be tested using a Gauss Gauge?

1. A only

2. B only

3. Both A and B

4. Neither A nor B

The correct answer is: Neither A nor B

In the context of fuse testing, the assertion made by Technician A is not correct because a test light should illuminate on both sides of a fuse when the fuse is functioning properly. If the test light only lights on one side, it indicates that there may be an issue with the fuse itself or with the circuit beyond the fuse. A functioning fuse should allow current to flow through it, which means the test light should indicate power on both terminals. Technician B's statement regarding the use of a Gauss Gauge is also not appropriate in this context. A Gauss Gauge is utilized for measuring magnetic fields and is not applicable for testing fuses. Fusible links and fuses need to be tested for continuity and circuit integrity typically using a multimeter or a test light, rather than a Gauss Gauge. Overall, both technicians have provided incorrect information regarding the proper methods for testing a fuse.