What does an "infinite" reading (10 megohms or greater) on a solenoid coil indicate?

An "infinite" reading of 10 megohms or greater on a solenoid coil is indicative of an open solenoid. This high resistance value implies that there is a break or discontinuity in the circuit, resulting in no current flow through the coil. Essentially, the coil is not completing the electrical circuit, which is characteristic of an open circuit condition.

In practical terms, a solenoid needs to be able to conduct electricity in order to function correctly. When you measure resistance and obtain a value that suggests an infinite resistance, it means there is no conductive path for electricity within the coil, confirming that the solenoid is open.

This type of reading can help technicians diagnose issues within the solenoid system, allowing them to determine that if the resistance is extremely high, the solenoid needs to be replaced or repaired due to its inability to operate as intended.