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My horns quit working a few days ago. They're both OK when activated by PKE/alarm system, but pressing the steering wheel buttons elicits no response from horns nor any relay clicking noises. Might the horn relay still be bad even tho horns still work w/ alarm, or is the source of my problem...

My C4 Ruby coupe's Climate Contol System has, evidently like many others, decided to cease responding to operator inputs. I'd like to attempt to remove the unit and clean the contacts, a procedure that appears to have been successful in many cases. If contact cleaning doesn't work as hoped, I...