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Old 03-16-2023, 07:47 PM #1
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Horn only working when moving
I have discovered that my horn only works when I am in drive and moving forwards, not when parked or reverse or anything.

Any ideas on what it could be?

The fuse is okay, and I swapped in another to be sure, the clockspring appears to be working as cruise works, maybe a bad ground? I can't hear the relay click when I hit the horn while parked.
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Old 03-16-2023, 07:53 PM #2
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Bad horn contacts. Maybe just warm enough when you're moving to heat it up. As I can't see any reason for the horn not to work all the time as they do. Clock spring probably toast from someone grabbing the steering wheel to get in.

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Old 03-16-2023, 07:55 PM #3
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Quote:
Originally Posted by brillo_76 View Post
Bad horn contacts. Maybe just warm enough when you're moving to heat it up. As I can't see any reason for the horn not to work all the time as they do. Clock spring probably toast from someone grabbing the steering wheel to get in.

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The airbag does feel slightly loose, so it might be that as well, I didn't think it'd be the contacts
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Old 03-17-2023, 11:36 AM #4
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Quote:
Originally Posted by brillo_76 View Post
Clock spring probably toast from someone grabbing the steering wheel to get in.

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Didn't know this could kill a clock spring, interesting. I normally grab the oh crap handle to get in, I'll be a little more cognisant about that in the future.
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Old 03-18-2023, 02:44 PM #5
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I've discovered my cruise control isn't working now, does that change anything or is it still the clockspring?


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Old 03-18-2023, 06:29 PM #6
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Quote:
Originally Posted by RodrickHeffley View Post
I've discovered my cruise control isn't working now, does that change anything or is it still the clockspring?


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Have you checked that your brake pedal is properly adjusted and contacting the cruise switch? I had that problem with my clutch when I first got my truck.
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Old 03-18-2023, 06:35 PM #7
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Could even be a warn out switch that needs replaced.

If manual could be a bad switch on the clutch padel

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Old 03-18-2023, 06:52 PM #8
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Quote:
Originally Posted by Rushthezeppelin View Post
Have you checked that your brake pedal is properly adjusted and contacting the cruise switch? I had that problem with my clutch when I first got my truck.

I haven't, but I figured that seeing as the horn has stopped working and the cruise has also when before they both worked fine that they're both related issues.


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Old 03-18-2023, 08:58 PM #9
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I haven't, but I figured that seeing as the horn has stopped working and the cruise has also when before they both worked fine that they're both related issues.


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Does the cruise light come on or not? The cruise light will still come on if its your brake switch. It won't if it's the clock spring I would presume.
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Old 03-18-2023, 09:47 PM #10
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Quote:
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Does the cruise light come on or not? The cruise light will still come on if its your brake switch. It won't if it's the clock spring I would presume.

no, it doesn't


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Old 03-19-2023, 10:10 AM #11
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It could be contacts (I doubt it, though), the clock spring (my guess it that since the cruise control is not working, this may be it) or a bad ground (unlikely since you report that it is working and not intermittent).

I have a '99 Sienna that I removed the air bag, steering wheel, contacts and clock spring on, then squirted WD-40 down the shaft to remove rust on a steering shaft bearing. It wasn't making a good ground. Horn works fine now, no other problem with it. It might be of some help to you to watch my video on taking things apart. If it is the clock spring you might have some luck at a junkyard. It's an expensive part. Maybe the process is the same for your 4Runner's steering wheel.
https://www.youtube.com/watch?v=b8g87FX1VBM
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Old 03-19-2023, 10:36 AM #12
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Quote:
Originally Posted by ArthurKotb View Post
It could be contacts (I doubt it, though), the clock spring (my guess it that since the cruise control is not working, this may be it) or a bad ground (unlikely since you report that it is working and not intermittent).

I have a '99 Sienna that I removed the air bag, steering wheel, contacts and clock spring on, then squirted WD-40 down the shaft to remove rust on a steering shaft bearing. It wasn't making a good ground. Horn works fine now, no other problem with it. It might be of some help to you to watch my video on taking things apart. If it is the clock spring you might have some luck at a junkyard. It's an expensive part. Maybe the process is the same for your 4Runner's steering wheel.
https://www.youtube.com/watch?v=b8g87FX1VBM

interesting, I think you might be right, yesterday I took a lap around my town to see if anything had changed, the cruise/horn this time were working intermittently, I'll have to find a diagram somewhere that shows where it grounds.


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Old 03-19-2023, 10:47 AM #13
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I did some more digging and found this thread: Cruise Control Mystery Malfunction ON/OFF "sometimes" | Toyota 4Runner Forum [4Runners.com]

I suspect that if the clockspring is/was bad that the airbag malfunction light would turn on, which it hasn't.

However, another thread said the horn directly grounds to the body, if that's the bearing or another wire I'm not sure yet, I'll have to do more digging.


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Old 03-19-2023, 11:24 AM #14
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Quote:
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I did some more digging and found this thread: Cruise Control Mystery Malfunction ON/OFF "sometimes" | Toyota 4Runner Forum [4Runners.com]

I suspect that if the clockspring is/was bad that the airbag malfunction light would turn on, which it hasn't.

However, another thread said the horn directly grounds to the body, if that's the bearing or another wire I'm not sure yet, I'll have to do more digging.


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The clock spring contains several different circuits so it’s likely that the horn and cruise control circuits in the clock spring are worn and not making good contact. My vote is on the clock spring. Even more likely to be the clock spring if your airbag went off during your accident.

Edit: the horn grounds to the body where it bolts to the body.
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Old 03-19-2023, 11:55 AM #15
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Quote:
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The clock spring contains several different circuits so it’s likely that the horn and cruise control circuits in the clock spring are worn and not making good contact. My vote is on the clock spring. Even more likely to be the clock spring if your airbag went off during your accident.

Edit: the horn grounds to the body where it bolts to the body.

I did replace the clock spring after the accident, so I'm not sure if that'd be the cause, however I think I'll just order one once I find one.

I do know the horns ground to the body, but I was thinking maybe the problem was grounding the clockspring

If it's not the clockspring, I can at least sell it to my friend who ironically has a really similar problem to me.


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