CT200H horn not working! Help!

Mo786 · July 28, 2021

Need some urgent help guys!!! The horn in my CT200H has stopped working intermittently. It only works when I press the horn whilst the steering wheel is slightly turned in either the 2 o'clock or 10 o'clock position but doesn't seem to work if my steering wheel is dead straight. No warning lights on the dashboard. Only noticed this today and it worked fine straight after I retrofitted my cruise control switch on my steering wheel a month ago.

200h · July 29, 2021

i'd be looking at the clock spring cable

stormchaser · July 29, 2021

Common problem on these and exactly as 200h has said it will be the spring.

200h · July 29, 2021

is this problem urgent as stated in the post as this is the 2nd post for the same issue

by the originator the 1st being the 8th of May 2021 and yet no suggestions seem to of been tried

Mo786 · July 30, 2021

Trouble is mate, I don't know the best place to source this clockspring and I'm hearing that the actual part costs almost £800 from a Lexus dealership. I've got an upcoming MOT which I know will fail because of this horn issue.

If I had known that this was a common problem with this model of car, I would've never purchased it 😒

200h · July 30, 2021

in your other post i did leave a link for a breakers yard for you to use

Mo786 · July 30, 2021

I really don't fancy paying £800 for a clockspring and whatever else on top for labour. £200 to £300 for parts and labour is fair enough but £800 is far too dear for a intermittent horn problem that is driving me up the wall

Mo786 · July 30, 2021

Thank you so much for that mate, I spoke to an advisor there and he's convinced its more than likely that it's a problem with the connections for the horn which only make contact and sound the horn whenever I move the steering wheel about

200h · July 30, 2021

i dont think you know what a clock spring cable is mate,

the easiest way to describe to you is that cable is a

coiled ribbon cable with a number of tracks on it

the tracks provide connections for the airbag,horn,cc and all steering wheel functions,

when you turn the steering wheel 1 way the ribbon cable will

tighten and become smaller in diameter turn the wheel in the

opposite direction the cable will become looser and larger

in diameter so every time you make a movement of the

steering wheel this cable is contracting and expanding and over a period

of time can fracture and fail, if your can has been used as a town car

the steering wheel will of course had more use in comparison to

a car being used on the motorway .

overall i feel you have done well with this cable, your car has had

10 years of use and the clock spring cable will only be 0.5mm in thickness

so its quiet fragile even when new.

ColinBarber · July 30, 2021

Genuine ones are expensive but there are cheap copies available.

Not sure this is exactly the one you need but as a guide:

https://www.ebay.co.uk/itm/383834621722

Poundy · July 30, 2021

i must admit it's hard for me to recall the last time I ever had a need to use my car horn. Certainly not on the Lexus in the last 4 years of ownership, of course I presume they are all working ok as evident by the MOT certs. 😉

stormchaser · July 31, 2021

2 hours ago, Poundy said:

i must admit it's hard for me to recall the last time I ever had a need to use my car horn. Certainly not on the Lexus in the last 4 years of ownership, of course I presume they are all working ok as evident by the MOT certs. 😉

Me too i,ve rarely had an occasion to use it but i did check today after reading the post and it,s ok.

The item in the eBay link would be the part needed and well worth buying to save a big expense from Lexus.

Mo786 · August 24, 2021

I'm happy to report that the horn issue has now been resolved and it turns out it was a dodgy clockspring all along, had a aftermarket clockspring installed and the horn and other functions work like a dream.

Thank you all for invaluable input into this matter, if anyone needs any help or advice drop me a message.

Shah1812 · August 7, 2022

On 8/24/2021 at 3:52 AM, Mo786 said:

I'm happy to report that the horn issue has now been resolved and it turns out it was a dodgy clockspring all along, had a aftermarket clockspring installed and the horn and other functions work like a dream.

Thank you all for invaluable input into this matter, if anyone needs any help or advice drop me a message.

Hi Mo,

I have recently discovered the same issue with my 2012 ct200h. At about 2 o’clock or 10 o’clock the horn works but at straight position it doesn’t.

Would you care to let me know how much it cost you and who can sort it out?

thank you

Las Palmas · August 8, 2022

The part you installed would be good to have a link to. Maybe another is unlucky to need that info.

Mo786 · November 1, 2022

I do apologise for the late reply, I have managed to get this fixed at a reasonable price at a local Vehicle Electrician specialist in Central London.

I had to purchase a non-OEM part to resolve the issue. But since its installation there has been no issues, all steering wheel functions have returned to normal and the horn works perfectly!

I have included a link to the part that I purchased on eBay which cost me around £40 at the time (£800 for an OEM part), and I was charged £60 for the installation by my Vehicle Electrician. Have had it installed for over a year without any issues.

Please see the link below for the part required:

https://www.ebay.co.uk/itm/324945457010?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=UYc4-p3_T3y&sssrc=2349624&ssuid=80g8Mr4hSxe&var=&widget_ver=artemis&media=COPY

Here is the Vehicle Electrician that I used for the installation of my clockspring, they can source the part for you should you have any compatibility issues with parts as is often the case sometimes with eBay.

D C Auto Electrics https://g.co/kgs/prW39m