Thanks. Very helpful. Found a manual for it. It's a Rainjet RJ6. Mine is missing the transformer (the special AC adapter). Going to see if I can get it at Home Depot or Ace. Have seen where I can get it online for $21.
We have a Rainjet sprinkler system. Have never been able to figure out how to turn it on since we moved into our old house. Must have been disconnected from the curcuit. Inside reads 906901 and dated from 1996. Any websites where I can track down an owner's manual?