Rewiring a Hunter EC Controller: Identifying Zone Wires

After pulling wires from a Hunter EC control box, the homeowner has four wires (red, white, green, blue) and doesn't know which goes to which terminal.

Systematic Rewiring Method

1. Identify Common: White is typically the common wire. Confirm by checking the valves—one wire connects to all solenoids.
2. Connect Common: Attach the common wire to the "C" terminal.
3. Map Hot Wires: Turn on station 1 manually. Touch each remaining wire to the station 1 terminal until the desired zone activates. Label that wire. Repeat for stations 2, 3, etc.

This trial-and-error method works reliably when wire colors don't follow a standard.