older non progressive with the large controller
from the bottom of the controller up as your looking at the control face the wires are black, red, blue, white.
Use a test light and with the 12v and ground hooked to the unit already, hit the spray button and figure which connector is sending 12v to the the pump. Then with your test light still grounded, probe each of the other three connectors. One will light your 'spray' light - blue on mine, one will trigger the low alky light and the other is the ground to the pump. Hopefully this works with the prog. systems too.