What does an infinite reading indicate when checking a component?

An infinite reading indicates that there is an open circuit within the component being tested. When using a multimeter to measure resistance, an infinite reading typically means that the current cannot flow through the component due to a break in the circuit. This suggests that there is a disconnection or fault within the component, confirming that it is not completing the circuit as it should. Therefore, when one sees an infinite resistance reading, it strongly indicates that the component is open and needs to be either repaired or replaced for proper functionality.

In contrast, a functioning component would show a finite resistance value, shorted components would display zero resistance, and a grounded component would exhibit a very low resistance reading as well. Thus, recognizing that an infinite reading signifies an open condition is crucial in automotive electrical diagnostics.