The "bulb failure" warning light of a vehicle is illuminated whenever the headlights are turned on. Technician A says this can be caused by an excessive voltage drop on the ground circuit of one of the park lights. Technician B says an incorrect bulb may be installed. Who is correct?
A) Technician A only
B) Technician B only
C) Both Technician A and B
D) Neither Technician A nor B

Question

Quizplus · Accepted Answer

Both Technician A and Technician B are correct. An excessive voltage drop in the ground circuit can cause issues with the lighting system, including triggering a bulb failure warning. Similarly, installing an incorrect bulb can also lead to a bulb failure warning because the vehicle's electrical system may not recognize the bulb or it may draw the wrong amount of power, causing the system to flag a failure.

The "Bulb Failure" Warning Light of a Vehicle Is Illuminated