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Heavy Duty Equipment Technician Red Seal Exam Prep · Question

When diagnosing an intermittent electrical fault, which of the following is often the most effective initial troubleshooting step?

Many intermittent electrical issues are caused by loose, corroded, or damaged connections and wiring. A thorough visual inspection can often pinpoint these issu

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Question: When diagnosing an intermittent electrical fault, which of the following is often the most effective initial troubleshooting step?

Answer options: ✅ Visually inspecting wiring and connectors for damage

  • Immediately replacing the suspected faulty component
  • Using a scan tool to check for diagnostic trouble codes (DTCs) if applicable
  • Performing a complete continuity test on all circuits

Correct answer: Visually inspecting wiring and connectors for damage

Explanation: Many intermittent electrical issues are caused by loose, corroded, or damaged connections and wiring. A thorough visual inspection can often pinpoint these issues quickly and prevent unnecessary component replacement or complex diagnostics.

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