Wiring a Toro Wireless Rain Sensor (Model 53770) to Hunter SRC Controller

Connecting Toro 53770 Sensor to Hunter SRC

A homeowner has a Hunter SRC 9‑station controller and a Toro Wireless Rain Sensor (Model 53770). Wiring instructions are unclear; they need terminal‑by‑terminal guidance.

Step‑by‑Step Wiring

1. Unplug the transformer.
2. Connect one red sensor wire to one AC terminal, the other red wire to the other AC terminal.
3. Remove the common wire from the C terminal, wire‑nut it to the sensor’s white wire.
4. Connect the sensor’s brown wire to the C (common) terminal.
5. Plug the transformer back in.

This configuration enables the sensor to interrupt the common circuit when rain is detected.