Prepare for the Automotive Service Technician Period 1 exam. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

An ohmmeter reading of infinity indicates which of the following?

An ohmmeter measures resistance by sending a small current through the circuit and sensing the voltage. If the reading shows infinity, there is no current path between the test leads, so the resistance is effectively infinite. This means the resistance is higher than the meter can read, i.e., the circuit is open or not connected. A short circuit would show very low resistance (near zero), and zero resistance would indicate a dead short. A damaged meter isn’t the necessary cause of an infinity reading; an open circuit in the test setup is the usual reason.

An ohmmeter measures resistance by sending a small current through the circuit and sensing the voltage. If the reading shows infinity, there is no current path between the test leads, so the resistance is effectively infinite. This means the resistance is higher than the meter can read, i.e., the circuit is open or not connected. A short circuit would show very low resistance (near zero), and zero resistance would indicate a dead short. A damaged meter isn’t the necessary cause of an infinity reading; an open circuit in the test setup is the usual reason.