Question

Technician A says that a voltage drop of 0.8 volts on the starter ground circuit is within specifications. Technician B says that high starter draw current could be caused by a spun main bearing in the engine. Who is correct?

Answer 1

Answer:

Technician A is wrong

Technician B is right

Explanation:

voltage drop of 0.8 volts on the starter ground circuit is not within specifications. Voltage drop should be within the range of 0.2 V to 0.6 V but not more than that.

A spun bearing can seize itself around the crankshaft journal causing it not to move. As the car ignition system is turned on, the stater may draw high current in order to counter this seizure.