Good Afternoon -
I am really interested in upgading my existing Rainbird controller (unknown model). I have been unable to identify the model, but was able to open it up, and it seems fairly straightforward. From the documentation online it seems that the wires on the right go into the zones, white on the lower left is common, but the mystery to me are the three in the upper left (red, yellow, blue)....
any help would be greatly appreciated.
Thanks, and have a great one.