Horn not working
#16
Driver School Candidate
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Hi all I am having a very weird issue. When my car is off the horn works, I can also hit the panic alarm on my fob and the horn works, but when the car is running the horn does not work. Any thoughts?
#17
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I am having the exact same issue. just started . I think its in the software. thats the only recent change recently.
#18
Lead Lap
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In my case, the horn pad no long depressed easily when pressed at some points. Sometimes the horn could be made to sound by depressing the horn pad with greater force or pressing the horn pad at different points.
#19
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It could be a problem with the horn pad if it is similar in design to the one on the 2000 LS400 I used to have which had a similar horn problem at about the 10 year mark. Mine was not repairable due to the horn part of assembly being held together with rivets. My usual indie Lexus repair shop diagnosed the problem cause and obtained a salvage horn pad / air bag assembly at a fraction of the cost of a new one. Total repair cost back then (around 2010) using the salvage horn pad / air bag assembly was around $800.
In my case, the horn pad no long depressed easily when pressed at some points. Sometimes the horn could be made to sound by depressing the horn pad with greater force or pressing the horn pad at different points.
In my case, the horn pad no long depressed easily when pressed at some points. Sometimes the horn could be made to sound by depressing the horn pad with greater force or pressing the horn pad at different points.
#22
Racer
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Not a simple fuse, relay, horn setup. Well, ain't that great.
HORN SYSTEM DESCRIPTION When the steering pad (horn button) is pressed, a signal is sent from the steering pad through the steering pad switch (steering pad ECU) to the spiral cable. The spiral cable and front light ECU (front controller) communicate via the CAN line. The front light ECU receives the signal and sends it to the vehicle horns, causing the horns to sound.
HORN SYSTEM DESCRIPTION When the steering pad (horn button) is pressed, a signal is sent from the steering pad through the steering pad switch (steering pad ECU) to the spiral cable. The spiral cable and front light ECU (front controller) communicate via the CAN line. The front light ECU receives the signal and sends it to the vehicle horns, causing the horns to sound.
Last edited by fwhomeboy; 04-21-20 at 07:11 AM. Reason: info
#23
Racer
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OK, now I see why most people just skip the horn troubleshooting and take it to the dealer. You just gotta have techstream to isolate this problem. Oh well, I gave it the old college try. Good luck guys. I call "Uncle" !!!
#25
Racer
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My horn started working again. I checked the connections at the ECU and gave the ECU a few sharps taps. I didn't do anything else. Hmmm. I know it's not fixed, but, it's working for now. I'll update when I find the problem.
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fwhomeboy (06-11-20)