I need to install an alternate horn (non original horn button) Does anybody have any wiring suggestions? I was thinking of using the existing black wire to the steering wheel horn (cutting and splicing to new horn button on dash then from the horn button to a secure ground location behind the dash) There are two connections on the horn button.

The horn itself is operational.

I do not believe there is a relay.

Thanks in advance.

Hi 740gt,

Your horn quit working at the steering wheel / air bag pad when you press it?

You de-powered the air bag (disconnect the battery negative terminal and wait a few minutes, I guess), removed the air bag from the steering wheel, reconnect the batter negative terminal, and confirmed nothing you do, when futzing with the horn switch wires to ground the horn circuit (what the switch does inside the steering wheel under the air bag) does not activate the horn, then.

https://www.volvoforums.org.uk/showthread.php?p=2284977

So, that may mean the steering wheel slip ring (the rotating contact for the horn ground and the two air bag conductors no longer provides contact for the steering wheel ground (used by the horn) and steering wheel horn switch? It may work for the air bag contacts as you steer. Yet a brush contact for the horn may have failed. The ground or the conductor that travels back to the horn.

Though you would need to test this to confirm, if not already.

No relay. See http://www.volvowiringdiagrams.com/

The 1993 PDF shows a simple line art of the horn circuit on one page.

If you do not want to replace the steering wheel slip ring, or test it to indicate some manner of failure, yet want to restore your horn, it would be best to get under the dash and / or behind the instrument cluster, find the two wires that travel and connect to the steering wheel slip ring, add wire, maybe slid these wire into some manner of protection sheathing or loom. And choose a location and method to secure a doorbell-like spring contact switch.

Though the steering wheel is the best place for the horn switch, as you may need to sound the horn while making a some manner of evasive maneuver to avoid another motorist-operated vehicle.

Though others will offer better and more innovative solutions, I'm certain.

Each of my Volvo 240s has between three, for, and five horns. Though a high current fast action relay would help increase the volume. I call it the g** darned-it horn arrangement.

Much reason to say g** d*** these dayze.

Questions?

Hope that helps you.

Had I gone Saab or BMW in the 1980s, one wonders how that would have worked out.

Chaim Perelman: Rhetoric Theory.
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