How do you wire a Orbit rain sensor to a rainbird ISA 408?

Remove the battery for 15 minutes and replace it with a new Duracell MN1500.

https://www.google.com/search?q=Rainbird+isa+408

..

1260 wiring

https://www.google.com/search?q=rain+bird+rc-1260bi+wiring+diagram

600

https://www.google.com/search?q=rain+bird+SST-600in+wiring+diagram

..

http://www.rainbird.com/homeowner/support/timers/ISA-300_ISA-400.htm



http://www.rainbird.com/documents/diy/man_isaseries.pdf

Here is an instructional manual that may help you.

https://ww3.rainbird.com/homeowner/support/rotoradjustment.htm
Also check this site for one.

https://www.manualslib.com/

Here are some operating instructions for the rainbird system.

https://ww3.rainbird.com/homeowner/support/rotoradjustment.htm

This Rainbird site has a parts section. You may find your part.

https://ww3.rainbird.com/homeowner/support/rotoradjustment.htm

Just cut the common wire and put one end in each of the 2 pins. The rain sensor just interrupts the signal to the valves when wet.

Copy following links to identify timer manual and general wiring illustration:
http://waterheatertimer.org/Woods-timers-and-manuals.html#sprinkler
http://waterheatertimer.org/images/orbit-connections.jpg
Do not connect voltage directly to COM and Pump terminals... these terminals have their own 24Volt AC output when timer turns ON. When timer turns on, the 24V flows to Relay. This action will cause electro-magnet to pull two points together, and that will turn on the pump.
Same with the sensor terminals. Do not connect power to rain sensor terminals. The rain sensor plugs into outlet, and produces it's own 24V ac output. So when rain sensor activates, this cuts power to timer, and then timer will automatically bypass the watering schedule until rain sensor again resumes power output to timer.
Gene

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

How does one connect the Wired Toro Rain Sensor, Model 53769 to the Orbit, Model #57979?

All you have to do is set the program 'A B' switch to the 'A' position. The program that you have set for A will run only. B is not active.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/craig_3fa289bf857b1a3c