Circuit breakers used on a vehicle may cause the headlights to flash ON and OFF.

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $24.99Unlock all

Prepare for the CR104B Vehicle Electrical and Mechanical Systems Test. Access flashcards, multiple choice questions with hints and explanations. Ace your exam!

Multiple Choice

Circuit breakers used on a vehicle may cause the headlights to flash ON and OFF.

Explanation:
Circuit breakers protect a circuit by acting as switches that open when the current is too high. If a breaker is worn, loose, or overheating, its contacts can bounce or trip repeatedly. Each trip interrupts power to the headlight circuit, and as the breaker cools or the contacts re-close, power returns, causing the headlights to flash on and off. So a faulty or marginal breaker can cause flickering headlights, even though a healthy breaker wouldn’t. It wouldn’t make the lights stay on longer, and it wouldn’t instantly drain the battery—the flicker comes from the breaker opening and closing the circuit rather than a constant load on the battery.

Circuit breakers protect a circuit by acting as switches that open when the current is too high. If a breaker is worn, loose, or overheating, its contacts can bounce or trip repeatedly. Each trip interrupts power to the headlight circuit, and as the breaker cools or the contacts re-close, power returns, causing the headlights to flash on and off. So a faulty or marginal breaker can cause flickering headlights, even though a healthy breaker wouldn’t. It wouldn’t make the lights stay on longer, and it wouldn’t instantly drain the battery—the flicker comes from the breaker opening and closing the circuit rather than a constant load on the battery.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy