Roaster

I have a C1279 error in ABS "ECU". This could be defect Yaw sensor or bad wiring betwen Yaw sensor or ABS unit. But where is this ABS Unit located? I want to check wirings on that one before trying to replace the Yaw sensor. I know there is a ABS Pump located close to the break cylinder, but is there not some unit between the yaw-sensor and this actuating unit?

Any other ideas of how to fix this fault, except buying a new yaw sensor that may or may not help depending on if it is really broken?