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There is a "clockspring" wiring spiral in the steering wheel to accommodate the rotating steering wheel with controls on it. If this breaks, you may lose some or all functions controlled by stuff on the s-wheel.
yes, it could be a fuse OR a relay. If the fuse is good look for the relay. The relay (probably in a box with other relays under the hood) should make a click when someone pushes the horn button. If the relay clicks, the problem is probably the horn. To verify the horn is bad, hotwire it to the battery and see if it blows. You can look up the cost of a new horn online. I don't think they are expensive. Let un sknow if you have more questions. If all of these parts are good the problem is in the horn button or wiring. Please get back to us if it comes down to that.
There are three reasons for the horn going out. It could be a blown fuse "check the owners manual for fuse location", check the wiring at the connection on the horn "corrosion often occurs", or the the horn itself is bad. Hope that helps!
easiest way to check a relay is to swap it with an identical, known good relay. look at the part number on the horn relay, find a matching one in the fusebox (maybe A/C compressor or low beam). if it still doesn't work, have someone press horn while you touch the relay. you should feel it click if it is activating. if it clicks, the switch is good. if not, the switch is not sending power to activate relay
You should check fuse #32 (15amp) to make sure that it is good. then you should check the horn relay. Remove the relay and check for power source on two of the terminals (terminals 1 and 5). Press the horn button and you should have a ground on one terminal (terminal 2). The fourth terminal (terminal 3) should be power out to the horn. Terminal 4 is unused.