which of the following is needed when diagnosing an electrical concern?\na) symptom chart\nb) description…

Brief Explanations:

When diagnosing an electrical concern, a wiring diagram is crucial as it shows the electrical connections and layout, helping to identify issues. A symptom chart may be useful but not as fundamental. Description and operation information gives general knowledge but not specific electrical - connection details. PC/ED is not as directly relevant as a wiring diagram for basic electrical diagnosis.

Answer:

D. Wiring Diagram