A voltmeter was used to check the coolant and a reading of 0.2 volt with the engine off was measured. A reading of 0.8 volt was measured with the engine running and all electrical accessories turned on. Technician A says that the coolant should be flushed to solve the galvanic activity. Technician B says that the ground wires and connections should be inspected and repaired to solve the electrolysis problem. Which technician is correct?

Question

Quizplus · Accepted Answer

Technician B is correct because a high voltage reading with the engine running indicates an electrolysis problem, which is often caused by poor grounding. Inspecting and repairing ground wires and connections can help resolve this issue. Flushing the coolant, as suggested by Technician A, does not address the root cause of electrolysis.

A Voltmeter Was Used to Check the Coolant and a Reading