Which of the following indicates a potential wiring issue in an irrigation system?

A fuse consistently blowing in an irrigation system is a clear indication of a potential wiring issue. When a fuse blows, it typically means that there is an overload or a short circuit in the electrical system. This could occur due to frayed wires, connections that are shorting out, or a malfunctioning component drawing too much current.

In contrast, if the valve operates intermittently, it may indicate a problem with the valve itself or possibly a communication issue with the controller, rather than a direct wiring fault. A controller running on schedule suggests that it is functioning normally and following its programmed settings, showing no immediate electrical problems. Lastly, stable water pressure is indicative of proper hydraulic functionality rather than electrical integrity, so it does not point toward wiring issues. Therefore, the behavior of a blowing fuse directly correlates with electrical faults, making it the most telling sign of a wiring issue in the system.