Horn does not work

SGS Welding · Guru

Horn does not work

4SPEED427 · A Poncho Legend!

The circuit is actually a grounding circuit, not sure if you know that. When you push a horn button, it grounds the horn relay which feeds power to that green wire. I guess check to make sure the green wire is hooked to the horn relay. I think it's mounted on the rad cradle on the driver's side. I am thinking that if you would power your test light then try it on the black wire that runs up the steering column to the horn button, it should light when you press the button. That would be a show you the button is doing it's job.

All of this is just speculation, I've never had to actually do it, but the way the circuit is wired, this should be the correct testing.

And if I'm wrong about any of this, hopefully someone will come on and correct me!

Oh, and welcome to Canadian Poncho!

deleted · Guru

welcome to the site, the 67 rag is a nice car. Well, first thing is look for a blown fuse, should be one in the fuse box holder.

SGS Welding · Guru

Thanks for the quick reply!

ok if I start by looking for a blown fuse What one is it?

I looked at the fuse block holder and it does not state horn on any curcuit

I also read the operators manual and no mention of a horn in there either.

I guess they figure its just that obvious

Thanks for the welcome!!!

-- Edited by SGS Welding on Saturday 26th of April 2014 10:25:11 PM

427carl · A Poncho Legend!

Welcome Greg wonder how far Crediton is from Bronson Line Auto?

SGS Welding · Guru

not far

if you mean Zurich

deleted · Guru

you must be right if can't see it say horn there, I'm thinking older !! the relay should have a live wire to it, when you press the button it grounds and the relay sends the power to the horn. Did you test the horns alone if they blow by feeding a direct + to it ?

seventy2plus2 · Canadian Poncho Superstar!

This is usually where I ask the question, "Do you have a wiring diagram for your vehicle?". A wiring diagram is contained within the service manual, and will be your best friend when trying to diagnose electrical issues.

The theory is that when you press any of the 3 horn buttons, the buttons will ground to the steering wheel, which is grounded via the steering column. The horn buttons are connected to the signal switch, through various electrical connections to the horn relay, and the horn relay will provide +12v to the horns. Pressing any of the 3 horn buttons provides ground to the horn relay making it operate to provide +12v to the horns. The horns are grounded to the chassis.

JC2+2 · Poncho Master!

If 68 and 67 are the same and I believe they are, terminal 1 should be 12V power, 2 goes to the horn switches for ground and 3 feeds the actual horns. There may be a 4 but that is for an ignition buzzer so don't worry about that one.