Horn doesn't sound; can't locate it to test and replace
Car is a Hatchback DX. My guess is the horn itself is ok, but the problem is in the wiring. Honda says they would replace whole steering column assembly, as the airbag light stays on also. To avoid this expense in an old car, I want to wire the horn to a button switch to be installed on the dashboard, so I can at least pass inspection, which is due. My manual doesn't show me where the horn is, however, and at this point, I don't see where it is.
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Go to the Autozone.com site and register your vehicle for free. Then scroll to the bottom of the Homepage to the help sections. Some are free and some are pay sites.
The info you want is available Free. Should be under wiring and diagrams
Then go to Diagrams and there will be Power box info which will show Relay locations item by item. Remove the Horn Relay. Replace and switch the relay with a like part #. For testing, an unused Relay when the engine is OFF can be swapped to test.
If the horn will not sound with the different relay, your problem is not with the relay but with a wire or the horn itself.
Check fuse. Usually located under the Steering wheel or under the hood. You will have to use the other side of the cover to determine which fuse controls the horn and see if the metal link is broken. If both are not blown its probably a short in the wire. If it randomly just happened then its a good first guess without knowing any further details.
Usually I check all my fuses any time I am looking for a specific one. Sometimes a random fuse can be the cause, and not the actual Horn fuse that is blown.
OK, try to use a test light and connect the horn lead to ground to see if there is current, and to see if it sounds. If it does, then the wiring is fine to the horn itself. The relay may click, but are the contacts ok? Maybe swap out the relay for a new one.
if you take a test light and test all the fuses in the fuse box and if they are good then when pushing on the horn button you can usually hear the horn relay working(click).if it does then you need to check the horn itself.take a wire and run it from the battery positive cable and connect it to were the horn wire connects to the horn,it should blow(make sure of a good connection),if it does then it could be a dirty connection at the horn.if it doesn`t blow then the horn needs replacing.you can also use the test light and test for power at the horn wire at the horn itself to see if the horn is being feed power from the horn button to the horn.
The clicking sound you are hearing is the horn relay engaging trying to supply power to your horn. Most likely horn itself needs to be replaced. Locate horn underneath in front near grill. With test light check for ground & with someone pushing on horn switch, check for positive. If you have good ground & power when pushing on horn switch need to replace horn.
check the fuse if the fuse is good use a test light on the wire going to the horn if it lights up when you press the horn button then the horn itself is bad if it does not light up it means no power to the horn ,check fuses first ,and make sure the horn is grounded to metal, if you run a wire from the positive terminal of the batt. and touch it to the wire going into the horn the horn should work if not bad horn
If your horn isn't working and it isn't the horn itself the next thing to check is the horn wire in the steering wheel under the air bag. The little clip breaks off in time and the horn wire pops out. To repair you can remove the wheel and replace the part but I usually grind in a new notch in the old plastic and re attach the wire and it will work again.
Test the horn itself first. Just remove the connection to the horn and attach 2 wires to a live battery and tough the 2 sides of the contacts on the horn. If it blows the horn is good. If not replace the horn before you go any further.