Opel Astra H - horn doesn't work - how to repair the CIM module 

This wonderful tutorial is beyond perfection. Thanks a lot for sharing with those of us whose cars suffer from the same fault.

You are a wonderful person!! The steps and explanation are very clear, I've done the same process in the video and now work wonderfully .. Thanks so much for this!!

Just fixed my Astra using your video as a tutorial. Works perfectly now, thank you very much.

Hi! So i've followed this guide and got success results! I had problems with the horn and left radio controls module so i followed this guide to open the CIM module. I applied a special product for cleaning and lubricating electrical contacts (don't use WD40..), didn't have to scrape, just cleaned ALL contact points. I also did an additional thing: I soldered the board external connectors (There are three of them). The connectors are not soldered to make the outer plastic box separate from the CIM board, and they are fixed to the PCB using special "legged" pins with no solder that might loose it's effectiveness over time. All works fine now! Thanks again insaneinvader!

I will try tomorrow! Thank you so much the video is very clear! The world is better because of people like you!!

Thats a PERFECT video man. Thank you so much from Spain.

Thank you so much! My horn only worked when my car was off and this worked wonders. Im eternaly thankful for this walktrough. Thank you again!

My 57 Zafira had no horn/random radio volume issue. All I did was, disconnect negative battery terminal, push airbag out (didnt disconnect) and the small wires were all squashed. I carefully pushed them all to the sides whilst pushing the airbag back in. Reconnected battery...horn works every time and radio controls now work!! Really simple. The wires were squashed beneath the airbag...that's all.

this was a excellent video, clear and well presented. no room for mistakes really, thank you for taking the time 10/10

Helpfull video. The hardest part, as you sayed, was removing the airbag. A philips nr. 2 screwdriver worked the best for me. Thank you!

Thanks for the detailed tutorial, fixed my left stalk not turning on high beams. Moved the moving plastic part with contacts on the bottom of the PCB back into place and now it works perfectly fine, also scrubbed the through-hole pins so hopefully the horn thing doesn't manifest itself anytime soon. Airbag was indeed a pain in the back, for anyone struggling I would recommend pushing the screwdriver in at different angles (towards the center of the steering wheel) and pulling on the airbag until you feel it letting go a bit, then you know you can push as hard as possible to release it. The little while codewheel was difficult to remove as well but using a tiny flathead screwdriver works great for separating the brass pin from the case.

A+++ My partners horn didn’t work at all with or without lights on. Tried your recommendations and step by step procedure. Now fully working! Saved a few quid 👍

Brilliant video, fixed all the issues my sons astra had, and cost nothing, many thanks

Thank you very much. This was also true for my Astru H 2006 year. I did not work the siren and when I cleaned the contacts in the CIM module, my siren worked. Thanks again. Marino. Croatia

Thank you so much. Vauxhall wanted £80 just to run a diagnostic check and that's before parts. I've just done this and got my horn working again. You sir are a legend!! 👍👍👍👍

Great Tutorial Video, I followed all the instructions and after I had put the unit back in it was working like a dream. I wasn't sure what chemical you had put on the contacts so I used a small amount of GT85. The notes and warnings like (THIS WILL DIFFICULT) were very helpful. Thank YOU

Wciąż pomocne - 2 tygodnie temu naprawiłem swój CIM (szwankował klaskon i zamykanie z pilota), teraz jak nówka :)

Thank you for that! Really clear explanation and relatively easy to do. I'm no expert and managed to follow the instrunctions and get it done. All issues fixed!

Worked 100%, thank you so much! To those wondering whether to do it, it's a lot easier and quicker than it seems. There's less than 10 screws in total.

Excellent tutorial. It solved my horn issue. I soldered wires instead cleaning the contacts. Thank so much 😀. Good luck.

my indicators would'n cancel and thanks to you I managed to reset the angle sensor by looking at you taking it apart. you are a saving angel :*

Really informative and easy to understand. Met some difficulties that I was warned in video so wasn't caught by surprise. Now the horn works perfectly. Thank you so much!

Muchas gracias por el tutorial. Es magnífico. Me ha resuelto el problema en astra H 2007, España. Además de ahorrarme 500€.

This is great ,with the help of the video I was able to service my Astra H horn thanks.

I fixed it in 2 hours in my Astra 1.7 CDTI 2010. It wasn't connected with lights. Horn didn't work when it wasn't cold like -10 degrees. Thank you very much for your help.

Can’t thank you enough for this , works perfectly now , great video !!

Thank a lot for your help, I just saved £470 by doing my self. Big thank you. 👍

1. To remove airbag better use long hexagon driver as for bicycles. 2. Return steering wheel to center position before dismounting. 3. To remove levers I also use small hexagon driver of appropriate size.

Dobry i konkretny film. Bardzo mi pomógł.

Excellent guide. The clip 'fix' vauxhall fit FOC basically is a 10min job. The steering wheel need not be removed nor the airbag. The clip compressees the 2 piece steering control unit to allow the rusty / problem electrical contacts to better contact. Gets the car through the warranty period before it fails again. The contacts on my car were indeed oxidised. White film on aluminium. Other contacts are copper. Why vx used Al here? Cleaning didn't work for me but made the steering controls work again on left side only Methinks a new CIM needed or something else wrong. Already checked horn and earth. What is clear is that vxhall dealers have not bothered entering steering control box where code wheel is etc. Thumbs up for this video

EXCELLENT TUTORIAL...FIXED HORN IN HALF HOUR,MANY THANKS

Worked perfectly, thank you! I didn't have the problem with the lights/volume switch, just that the horn stopped working. Fuses were okay and I had already replaced the wiring loom under the airbag. Also, no power was reaching horn, so concluded it had to be the cim. Fairly straightforward to do but had a little trouble re-attaching the black ring thing that sits under the centre of the cim casing. Took me forever to re-align it properly so that it would sit in place correctly, prior to putting the three attachment screws back in. Took a bit of working out but got there eventually. Bit like a jigsaw puzzle! My indicators were also starting to play up, not always catching on the first/second time. This is another known fault I believe with Astras. Not only annoying but can be dangerous. This was an easy fix by cleaning the contacts while the cim was in two pieces. Indicators now working perfectly. I am slightly puzzled that my cim did not have a small white code wheel fitted. However, everything seems okay without it!

Great tutorial, hardest part was the airbag. Finished the job in 1 hour. I owe you some Beers Sir!

Thank you, just followed this on my daughters Astra H as intermittant horn inop. All seems good so far

Thanks very much, for sharing this. Not only is my horn working again, also my air bag light doesn't stay on anymore. Big thumbs-up 👍

SEI GRANDE. Video instructor utilissima spiegato abbastanza bene .trovo il tempo e lo provo

Don't ever try to remove plastic wheel the way it is done at 7:10! The pin is locked to the case and should pressed out from behind with a small torx for example, without force applied to the board.

Thank you for taking the time to produce this excellent video. I'm off to fix mine now.

Thank You very much mate ! You helped me to fix the problem ! Thanks again and regards from Italy !

man ur the best had my mot failed but followed ur tutorial and all fixed in 30 min!!!

You a star! Happened on my 1.8 Astra and on my current VXR. Going to try this one weekend :)

Thank you for your instructions. This helped me a lot.

Thank you! Worked a treat and the pins didn't even look badly corroded.

Вы большой молодец, спасибо вам огромное, благодаря вам все сделал все работает, спасибо!!!

One of the best videos ever made thank you keep up the good work

Wspaniale! Naprawione , dzięki wielkie !

Thank you for such an informative video. In my case it also fixed the left hand steering wheel up/ down control buttons which have been intermittent for years. BTW... i didn't have to remove stalks or the disc. Also, not sure if you mentioned it but there is a short term fix for horn which is to set the dash illumination right down which I'd been using before I came across your video. Thanks again, Adrian

thanks so much. did this carefully step by step and everything works good as new!

Hello everyone! I did everything like in video, but forgot to mark code wheel.... Assembled everything and my turn signal didnt come off. I disassembled it again and placed it like in this video, and it worked. Everything works, turn signals and of course steering wheel commands. I hope you all marked it like in the video! Thank you very much insaneinvader!!!!

Thanks a lot! This works for me too for my Astra H GTC 2009

Señor, es usted un monstruo. O dicho en su idioma. You are really big. Sir. I am having the problem at the left control of the wheel. If I cannot resolve in other way, the next weekend, I will do as you have explain so clearly. Thank you very much for your work.

Great video! I had the same problem but it solved by itself. If it comes up again I'll try to solve it your way. Thanks and greetings from Serbia!

Yay I did it, was a bit of a fluff but sorted, Thanks for the great video..👍

Thank you so much, worked perfectly!

great video man!!!!....in my astra gtc have the same problem!!!!.....unbelievable that the problem is due to that!!!!!

Very good step by step, 10 years ago I would of sorted it but not sure about my old eyes now lol. Just bought the car and didn’t know the horn was knackered and messing up the radio.☹️

Ive just done this and works perfectly. I was having issues with the left indicator not working sometimes as well as the horn and steering wheel buttons and they all work well now.

worked for me! thanks (Latvia)

Excellent video, many thanks for taking the time out to do this. 😎 .... but if I mayvadd an improvement, don't use a metal ended screwdriver to remove the air bag connections, use something insulated....you never know. 😉

Funcionó la solución #1. Claro y pragmático, gracias.

An very well detailed video 👍

Thank you very much, just fixed my horn with it. It had exactly the same problem!

Great video, it was very helpfull, thank you very much! Regards from Croatia.

Thanks alooot for your tutorial Helped me also to solve the horn problem. Thanks thanks thanks

Excellent video! What a pain in the behind cars are sometimes. This is weak design on Vauxhall’s part if it’s a common issue. My car has been suffering from this intermittently since I bought it about 6yrs ago.

Gracias my frend!! Tenia el mismo problema y me ha funcionado👌

Problem solved ! Thanks Mate

Thank you from Bosnia

Całkiem inaczej naprawiłem nie działający klakson, i od 2 lat trąbi tak, jak zespół Combi :-) Wystarczy wymontować dwa symetryczne wyłączniki w kole kierownicy - od przełączania radia i podobny z lewej. Trzeba je rozebrać, ostrożnie wyczyścić, kontakt sprayem, poskładać i Trąba Trąbi !!! :-) Pozdrawiam. Tanio, prosto i skutecznie, dot. Astry H z 2005 r.

Great work, thanks. I have one question. On 6:50 min in video on CIM module has one white wheel, i don`t had on my module when I repaired. What is this code wheel and what is hims work, thank?!

Chapuza😂muy buena ,hasta la fecha no he tenido la necesidad espero nunca😅

lux, mam nadzieję, że moje poduszki w końcu zasną.

vraiment magnifique tutoriel merci beaucoup bravo

Dzięki wielkie u mnie pomogło :)

thank you this worked for me

Good tutorial. I think I have a similar issue but with a vectra C 2007 the horn just doesn't work sometimes. But others it, does. Lights on or off makes no difference.

Most important part is to disconnect the batterie... dont work on a airbag when the batterie is still connected!!!!!!!!

Excellent video, will try it and report back

Excellent ! thank you.

Good job, thenks for your help. Regards Tomasz

Thanks very much. The car horn now works, very much a safety issue.

Kind off did everything accordingly, but in the end the horn doesn't work even with lights off.. Did take it apart one more time, and cleaned again, will see what happens now. Do anyone have some ideas what could be the problem? UPDATE: After second cleaning and reinstalling - everything works! You are the best! Can't thank you enough!

Great video and really well explained. Every time I drive my wife’s Astra and hit the horn, the stereo just gets louder and scares me instead!! My question is this, and apologies for sounding a bit thick..if I do this procedure like you have and repair the CIM I don’t need to “re programme” it to my key so I? I know I would have to with a new CIM but it doesn’t like reset or anything while you repair it? Cheers in advance….

This now is very helpful I've learned a lot thank you very much

Thanks, it worked :D only because i did not get the staring wheel to the completelly exact position (I tried but it was just one step to the right) now my steering wheel is a bit to the left :D Or maybe that is just the road, will see tomorrow. Anyways, you saved me as it was driving me crazy.

Looking to fix the same problem (no horn and odb control when lights are on) and I found your tuto (very precise and complete!). Do you confirm that only cleaning the pin contact will solve the problem.....? Not necessary to change the complete CIM or a pair of cables? Thank you

Many thx! Video is amazing. I had a same problem and 1st solution worked for me ;-)

Beyond perfecting tutorial

Guys, in case of mine, there was broken thread on metal plate, where block with triggers is located and fixed. So, it cause bad contact of SIM module and ignition lock. When i start the engine, horn wasnt work. After i fix this issue, horn do well! I fix it with putting into thread hole a peace of metal tape

Amazing video! Thank you!!!!

Thanks from Greece

thank you man you are the boss!!!

Could i fix the cruise speed with the same opening technique and finding out what is wrong in there? Most likely oxidation i believe cuz it works sometimes

Job done! Thank you 👍

Awesome video worked for me. But after about 1 year the horn is nog working anymore (Astra H 2004) I think I will fix it by soldering as you suggest.

Thanks ...Worked well, the only thing now is my High Beams don't seem to work anymore...Bugger

thanks to your video I fixed it

Thanks you saved me alot

Widzę film konkret, można spokojnie rozbierać. U mnie też występuje problem z klaksonem (astra h z 2008), zaczęło się niedawno i teraz niestety coraz częściej sygnału nie ma.Nie występuje tu zależność włączonych lub wyłączonych świateł. Od początku natomiast tj. od kupna przeze mnie tego samochodu, nie działa regulacja oświetlenia zegarów. Raz udało mi się "pobawić" a następnym razem nie działało. Wg informacji dla serwisów opla, samochód podlegał akcji serwisowej ale nie wiem czy ją odwiedził. Właśnie przymierzam się do sprawdzenia czy jest spinka na CIM, poźniej trzeba będzie rozważyć ewentualny demontaż modułu. Pozdrawiam.

insaneinvader Great vid! Thanks a lot. Question: Did you disconnect the battery for this?