Horn not working
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Fleet Mechanic
Joined: Sep 2012
Posts: 1,606
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Horn not working
1966 f100. Putting it back together, bought it apart.
I have no horn at the steering wheel. I checked for power at the horn relay. The yellow wire has power. The blue/yellow wire does not. I look at the wire diagram and i see that it goes to the horn switch. What should i be checking now to get this resolved?
thanks
I have no horn at the steering wheel. I checked for power at the horn relay. The yellow wire has power. The blue/yellow wire does not. I look at the wire diagram and i see that it goes to the horn switch. What should i be checking now to get this resolved?
thanks
Post Fiend
Joined: Apr 2002
Posts: 19,311
Likes: 97
From: Waterloo, Iowa
Does it work elsewhere in the circuit? Make sure the tiny brush and contact is clean, a little tarnish or corrosion will keep it from working.
Check for a jumper across the steering shaft rag joint too.
Check for a jumper across the steering shaft rag joint too.
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Fleet Mechanic
Joined: Sep 2012
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I started tracing continuity back from the relay and I think i found a broken pin at the firewall connection. i am in the process of checking that out right now. i will report back. thanks.
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Fleet Mechanic
Joined: Sep 2012
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OK. replaced the pin connector. Now i have continuity from the horn button under the steering wheel, (next to the signal switch) all the way to the horn relay end. in the blue/yellow wire.
I ground the blue/yellow wire to the battery negative, nothing happens. If i push the horn button under the wheel, nothing happens.
The yellow wire at the horn relay has power.
Now what? Thanks for the help.
I ground the blue/yellow wire to the battery negative, nothing happens. If i push the horn button under the wheel, nothing happens.
The yellow wire at the horn relay has power.
Now what? Thanks for the help.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 784
From: Simi Valley, CA
Horn brush fits into an insulator in a hole located on the outside of the steering wheel. The brush contains a thin copper wire that can snap.
Horn operates via the T/S switch.
Horn operates via the T/S switch.
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Fleet Mechanic
Joined: Sep 2012
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I have checked that brush and it is good. Actually i have checked both brushes and they are fine.
I am trying to get the horns to work before i put the steering wheel on just to eliminate some other issues.
I have provided power to the horns through a jumper from the battery and they work fine. so i know the grounds are good and the horns work.
I am trying to get the horns to work before i put the steering wheel on just to eliminate some other issues.
I have provided power to the horns through a jumper from the battery and they work fine. so i know the grounds are good and the horns work.
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Lead Gopher
Joined: Aug 2012
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From: Seattle
You might be missing the ground strap the goes from one side of the rag joint to the other - which provides the ground for the horn thru the column shaft.
Chad
Chad
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Thread Starter
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Fleet Mechanic
Joined: Sep 2012
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I have read many times about the ground strap. I made sure there was contact between the two sides when i assembled the rag joint. I did check for continuity from one side to the other. And i do have it.
I was reading a few other threads, so i decided to check for power at the insulator at the TSS. When i put my test light on the insulator, and the ground from the test light to the negative on the battery, the horn blew. So, does this mean i do or do not still have a problem?
I dont want to put the wheel back on if i am not done troubleshooting.
Thanks
I was reading a few other threads, so i decided to check for power at the insulator at the TSS. When i put my test light on the insulator, and the ground from the test light to the negative on the battery, the horn blew. So, does this mean i do or do not still have a problem?
I dont want to put the wheel back on if i am not done troubleshooting.
Thanks
Last edited by benbuilder; Apr 28, 2018 at 04:27 AM. Reason: added some words to clarify
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