Heavy Duty Equipment Technician Red Seal Exam Prep · Question
During a diagnostic procedure, a technician uses a multimeter to measure voltage drop across a seemingly good wire. If a significant voltage drop (e.g., greater than 0.2 V for a power wire) is found, what does this typically indicate?
A significant voltage drop across a wire indicates high resistance within that conductor, preventing sufficient voltage from reaching the load. This resistance
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Question: During a diagnostic procedure, a technician uses a multimeter to measure voltage drop across a seemingly good wire. If a significant voltage drop (e.g., greater than 0.2 V for a power wire) is found, what does this typically indicate?
Answer options:
- The circuit has excessive current flow. ✅ The conductor has high resistance.
- The component is shorted to ground.
- The battery is overcharging.
Correct answer: The conductor has high resistance.
Explanation: A significant voltage drop across a wire indicates high resistance within that conductor, preventing sufficient voltage from reaching the load. This resistance could be due to corrosion, a loose connection, or a partially broken wire.
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