The clock spring is used as a central location for all the column wires to run. Since these controls are not integral to the clock spring it will not be shown on the schematic. The clock spring is just being used as a junction box. The multi-function stalks, horn, EVIC switch, Radio controls, and cruise control switches all plug into the clock spring. At least they do on my 2013. After being rained on without a top or doors my clock spring went bad. Only cruise control would work. None of the other controls on the column would work. However, I never got any ESP or air bag lights. Parts of the clock spring can go bad, or the whole thing can go bad.