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Click on the link. Horn wiring, non-hybrid. The relay is part of micu, multiplex integrated control unit.
I don't believe the relay is removable. You can check the fuse. Not only check the fuse, use test lite to check voltage on fuse circuit. There are several things you can do to see if horn will sound. I couldn't get everything in the one picture. The horn shows a one wire connector, you can take connector loose, use jumper wire connected to B+ to see if horn will sound? You might use an inline fuse, just in case. Your horn switch is just a ground for control side of relay.
I can't diagnose the micu, itself?
Many vehicles have 2 horns so that the sound is more pleasant. If there is no wire connected to a horn, it can not (in my experience) make any sound. May I suggest that you have someone assist you by tapping the horn button while you locate the horn that is sounding.
Find the wire at the bottom of the steering column that comes down from the horn button, or locate the wire at the horn relay.. Cut this wire and splice it to a wire that goes to one side of a push button switch. Connect the other side of the switch to the metal chassis of the car, which is ground. A metal part of the dashboard frame will usually work.Then when you press the button, it will activate the relay and sound the horn.
the actual horn is behind the front grille near the bottom of the bumper or that area..looks like a snail shell but much larger..may have two wire connections or just one...a hot wire attatched to the connector should sound the horn if not replace but check before install..
The clicking you hear is the horn relay working.
I would locate the horn and insure the wiring is intact and the horn has a good solid ground.
Then while someone is pressing the horn button measure the voltage at the wire that attaches to the horn to ground. If you get 12v or more the horn is bad. If you don't get any voltage replace the relay
The fuse block is located below the dash and mounted to the fire wall. This area is where the brake pedel is located. If you still can't locate the fuse, open the hood and the horn is located behind the grill. Remove the wire from the horn. To fix the problem correctly it's possible that the horn relay is stuck closed which is why the horn blows. A wiring diagram will show the location of the relay. Most relays snap into the holder.
Lift the hood of the
truck. Locate the fuse box and lift the cover. Check the horn fuse listed on
the cover of the fuse box. If the fuse is blown replace it. Have someone press
the horn and listen for a faint click from the relay or swap the relay with
another one with the same part number (IGN or AC) to test the relay. If you
hear a faint click the horn switch on the steering wheel is good. If the horn
works after swapping it with another, the relay is bad and you should order a
new one. Remove the horn connector and check the voltage with a 12 volt lamp
connected to the two wires or a volt meter when someone presses the horn switch.
You can also directly wire the horn to the battery to see if it sounds. If it
does not sound the horn is defective. If you do not have voltage check the black
ground wire on the horn connector to see if it has zero ohms, or if you connect
the 12 volt lamp from the black horn wire to the +12 of the battery the lamp
should light. If not your ground wire is bad. I hope this helps you find your problem,
but if you have any questions post a comment and I will answer your question.
That's the horn fuse,you have located it;
I will assume that you have checked for a blown fuse, and that the fuse is good!! If not, check that first!With a test light and a jumper wire, you can locate the problem with little effort! You can get a test light from any auto supply store, or from Wal-mart! They are only a few dollars and are a very helpful thing to have. A jumper wire is just a piece of wire, that you can use to run power from one location to another! If you want to be fancy, you can put alligator clips on both ends! -Start by locating the horns and pulling the wire off of one. Attach your test light to a ground and use the probe (pointed end) to connect to the horn wire. -Have someone hit the horn button on the steering wheel! If the test light lights, then the horn(s) are bad and will need to be replaced! Just to be sure, take your jump wire and run from the positive battery post to the horn power connector (where you pulled off the wire) and make sure that the horn does not sound with direct power! -If there is no power to the horn, you will need to check the horn relay to see if it is getting power. If it is the relay is bad! If there is no power to the relay, the problem is in the steering column or steering wheel horn button! -Most likely the horn or the horn relay is bad! Good luck!!!
The owner should locate the horn circuit . prepare the tools or equipment to be used.So that when the horn circuit is check it function properly.locate horn unit,horn relay,horn switch,horn power supply.check the fuse, check the relay,check the switch,check the wires,check the horn unit.Observe safety precautions.Use terms to describe checking horn circuit. If there are worn out or malfunctioning parts replace them.If there are loose connections of wires then reconnect it . But if the owner cant do it go to a car mechanic and the mechanic will do the job.
Check your horn relay to see if you can't find the wire that goes to your horn. If cant find it you can bypass your relay and connect the wire directly to your horn switch located on your steering wheel.