Quote:
Originally Posted by kevinkpk
The plastic cam is an odd looking shape that turns off the turn signal(s), has nothing to do with the horn, sorry for the confusion.
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I disagree. The attached picture shows a part called a "turn signal cam". The bumps on the part are the cam lobes that cancel the turn signal, just like the cam lobes on a camshaft actuate the valves in the engine. The part that this cam activates is part of the turn signal switch. The circular metal contact ring is the horn contact slip ring. The post on the right side of the photo is what fits through the steering wheel hub. The spring and eyelet fit into this post and are retained with a plastic quarter-turn ring. The horn button retainer ring has a tab that touches the eyelet to complete the circuit.