My adventure with broken CIM unit in astra Hno horn but steering controls all workingCIM removed and replaced and programmedHorn working!!My Instagramhttps:/
The wiring could be a problem if your Astra’s Horn is not working when the lights are on. Check the connections between the Horn and the battery to ensure they are secure. If they are, then the problem may be with the Horn itself. Try replacing the Horn to see if that fixes the problem.
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