How is a horn relay wired?
How to Wire a Horn Relay
- Locate the original horn and disconnect the wire to it.
- Connect this wire to the relay at terminal 85 if 12 volts was present in the wire.
- Connect the horn wire to terminal 86 and terminal 85 to terminal 30.
- Mount the new horn and relay in a convenient location under the hood.
How do you connect a horn to a relay?
Step 1 Locate the original horn and disconnect the wire to it. Connect this wire to the relay at terminal 85 if 12 volts was present in the wire. Connect the horn wire to terminal 86 and terminal 85 to terminal 30. Mount the new horn and relay in a convenient location under the hood.
How can I find out if my horn wire still works?
Locate the original horn and disconnect the wire to it. With the vehicle key in the on position, depress the horn button and check for 12 volt power in the wire with a test light or multimeter.
What to do if the horn button is not depressed?
If 12 volts is not present when the horn button is depressed, use a continuity checker to test for continuity between this wire and the battery negative terminal. Connect this wire to the relay at terminal 85 if 12 volts was present in the wire.
What kind of wire does a car horn use?
Using new alloys, plastics and thinner materials is standard practice in newer cars. So too is the use of small gauge wiring and tiny horns that make nothing more than a pitiful beep, barely audible only a few feet away.
How do you run a horn through a relay?
Then run a wire from the positive battery through a fuse to terminal 87 on the relay. Run a wire from terminal 30 on the relay to the Wolo positive and ground the other Wolo wire. When you push the horn button it engages the relay and passes the battery voltage through the relay to the horn.
Where does the wire go on a stock horn?
The pink wire on the horn button actually provides the ground to the horn. There should be a brown (switched 12V) wire going to the other terminal on the horn. The two wires going to the stock horn would go to terminals 85,86 on the relay. Then run a wire from the positive battery through a fuse to terminal 87 on the relay.
Where do you put the fuse on a horn?
You can install one either at the battery, or most anyplace inline. However, if you run this horn circuit straight from the battery, I would install that fuse/circuit breaker at the battery. That way if there ever is a short on the line, the fuse/breaker will protect the entire circuit.
Can you run a Cheers Horn without a relay?
Cheers You can run that horn without a relay, but be prepared to listen to it wail uncontrollably until the wiring catches fire or the battery dies. If you are trying to use the original horn relay it won’t work. Go to the auto parts store and get one of the relays that are usually hanging right beside the air horns.