Cert IV Auto Diagnostic Practice Questions - Certificate IV In Automotive Mechanical Diagnosis (AUR40226) Exam

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A technician measures a voltage drop of 0.5V across the ground circuit of a starter motor solenoid during cranking. According to standard automotive specifications, what does this indicate?

This is a normal voltage drop for a starter ground circuit during cranking. The battery is discharged and cannot supply enough current to the starter. The starter motor internal windings are shorted to ground. The ground circuit has excessive resistance and requires cleaning and tightening.

Correct Answer:

The ground circuit has excessive resistance and requires cleaning and tightening.

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