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Toyota Service
Toyota Service, Lexus and Toyota expert
Category: Lexus
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I have a 2007 Lexus ls 460 and all of sudden my horn just

Customer Question

I have a 2007 Lexus ls 460 and all of sudden my horn just stopped working. NO lights indicating any other problems. What could this be
Submitted: 1 year ago.
Category: Lexus
Expert:  Toyota Service replied 1 year ago.

Hello. Welcome to Just Answer. Please allow me to assist you. There are not monitors for the horn system; if there is any kind of failure the instrument panel will not alert the driver. The problem here could be several things...the most common is a failure in the solder joint on the ribbon cable located on the spiral cable (commonly called a "clockspring"); this unit is what connects the steering wheel horn circuit tot he wires in the steering column. There is diagnosis that would determine this. I would get the diagnosis performed before replacing the spiral cable. The other two possibilities would be either a failed horn relay or a faulty horn, but those would be rare failures.

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