Opel Astra H - horn doesn't work - how to repair the CIM module insaneinvader 1.59K subscribers Subscribe Subscribed 768K views 7 years ago I've heard that users of Zafira and Vectra Fuses and relays box diagram Opel/Vauxhall Astra H. Identifying and legend fuse box. Horn. 15 A. 21. Engine electronics. 20 A. 22. Engine electronics. 7.5 A. 23. Fine file the groove of lightly sand clean grease the refit. Making sure steering position sensor marks are lined up and steering wheel marks also. Oh another note is after removing airbag straighten wheels before you remove anything as its a pain trying to line it up later on. Put back together. Opel Astra H - Faulty signal horn | HELLA Opel Astra H Year of manufacture: 2004 - 2010 Faulty signal horn. The above vehicles can experience signal horn failure due to a fault in the steering column´s electronic module. The fault often occurs after driving long routes with the lights switched on. A contact weakness in the steering column Just checking some bits before it goes for an mot and it’s having an issue with the horn. When pushed it doesn’t work. Had a read up and they are known for the cim to go but no matter what variation of lights/dash lights it won’t work. Plugged opcom in and ran a test on the horn and it sounded with no issues. Any ideas? Horn problems. I'm having trouble with the horn on my 2006 zafira 1.9 diesel. It was working intermittently before stopping all together. Checked fuse thats ok the horn itself was getting 12v and i could here the relay clicking so I replaced the horn with a new one but still not working. The fuse is still ok but I can't here the relay anymore . 2 posts · Joined 2008. #3 · Feb 8, 2008. tavimage said: go to www.vauxhall.co.uk, register for free, then sign in, go to my vauxhall link, then click on online manuals, then you can see an electronic version of your owners manual, and find the diagram through that. it wont let me copy paste it onto here for you, so you will need to look it up 21067 posts · Joined 2006. #10 · Feb 6, 2013. For pedal test get in car, hold accelerator and brake all the way down, insert key and turn to position II, keep holding those pedals down. Any stored fault codes will appear on your mileage display. 6081.