Horn Relay

[Flinny]

I have a 79 pick up that I am having issues with the horn. I need to know where the horn relay is located! any help will be appreciated...

Maria

[2ndGenToyotaFan]

I'm pretty sure there's no horn relay, but it is a switched ground system, which can be confusing. The + power comes from the bat, to the fuse block (Hazzard/Horn probably) under the dash, out to the horn, then back to the switch on the wheel, which grounds the circuit. The most common problem is the switch in the wheel stops making contact because the brass contact wears to the point that the spring can't push hard enough against the ring.

There is a link about this in the FAQ thread. Good luck Maria, and show us some pics of your ride if you get the chance!

[Flinny]

The problem started one day that the horn would not stop. I disconnected the cables from the horn and now i have no idea have to put them back, since I tried all the ways possible and no luck. The horn is not working....

[2ndGenToyotaFan]

You pulled the wires off of the horn its self? It should be just 2 connectors, one power in and one power out... Have you checked to see if you have voltage in and out of the horn? If so then the problem is most likely in the steering wheel, where a few things can go wrong.

[pappy]

I'm with Jerod. I looked at the EPC and I didn't see a horn relay for your truck. Look for voltage at the horn connector. My guess is you have something broken on one of the horn buttons on the steering wheel, or the horn contact has issues. If you have voltage at the horn pull the steering wheel off and see if it goes away.

[WristPin]

right, guys, there is no relay

it is possible the brass plunger that is mounted to the column is bent, or like Jerod said worn down.

Also, take off the cover on the steering wheel. make sure the 3 wires are connected. they are not directional, but the cover will probably only fit one way, so its probably not going to go together but one way.

its possible, but not likely the steering wheel needs to be snugged up on the shaft. use a 19mm socket to perform this.

the 2 wires to the horn come out on the passenger side along the fender. they are not directional. you can hook either wire to either terminal on the horn.

IMO the stock horn is wimpy, and quite pathetic. probably the only such part on the entire truck that holds this nature.

if you want to have a real horn check out these guys
Train Horns & Train Horn Kits By HornBlasters, The Name In Locomotive Horn Kits For Your Car Or Truck!

Oh, also Maria, a sticking horn will be caused by the contacts in the cover. like i said, it doesnt matter where the 3 wires connect under the cover as long as they reach. poke around and make sure nothing is broken, or for metal tangs bent too far or too little

[Flinny]

ok,

I have 2 cables for the horns. One is - and the other +. Now each horn has 2 connectors......and I have 2 cables.....What I am missing??? There is another cable near the battery that I dont know what is for...

Should I be getting power to the cables in the steering wheel? There is 2 green cables connecting to each side, but none of them have any power.

[2ndGenToyotaFan]

Is there power at any of the wires that go to the horns? If there is, but no power at the steering wheel then the horns could be bad.... or the wires from the horns to the steering wheel. How's the rust on your truck?

[Flinny]

rust is not bad. There is power to one of the cables that goes to the horn. I guess it may be a the cable that goes to the steering wheel, since i dont have nay power there.


Here is a pic of the truck

[WristPin]

the wires under the steering wheel cover are ground.

two wires at the horn, one ground one always hot.
the horn is turned on and off thru the ground wire.