Question

1. the fog lamps on the vehicle in the illustration do not work. with the fog lamp switch on, the technician observes the readings shown on the dmms. which of these could be the cause? (a) a failed relay (b) a failed fog lamp switch (c) a - blown 10a fuse (d) burned - out bulbs

Explanation:

A failed relay can prevent electrical current from reaching the fog - lamps, causing them not to work even when the switch is on. A failed fog - lamp switch would prevent the circuit from being completed in the first place. A blown fuse would cut off power to the entire circuit related to the fog - lamps. A burned - out bulb would only affect an individual bulb, not all fog - lamps not working. Since all fog - lamps are not working with the switch on, a failed relay is a likely cause as it controls the power supply to all fog - lamps.

Answer:

A. A failed relay