Cruise control will not work .

Looking at my harnesses, there is a solid blue wire from cruise controller at the turn signal that goes to one of the terminals on the 4 terminal brake light switch. The other blue wire at the brake switch is actually blue with a white tracer that goes to the single terminal on the servo and serves to provide power to the servo when the brake is not depressed. The reason for the extra terminals on the brake switch is that when the brake is not depressed it provides the power to the servo through a connection within the brake switch when the cruise controller is in the ON position. When the brake is depressed, it cuts power to the servo as a safety measure.

On the cruise controller itself, the ON/OFF switch connects the ON Side to the solid blue wire to the brake switch. The other wires on the controller control the other functions of the cruise. The OFF obviously turns everything off.

In your harness I’m guessing that the green wire is your hot wire and should be connected to a source in the harness or fuse box that is hot ONLY when the ignition is in the RUN position.