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Hi Im David and I will try and help as much as possible. From what i understand you are trying to locate the horn relay?
ok. do you have a voltmeter handy?
the click you are hearing is the relay working, so lets rule that out
ok, give me a minute
are your hazard lights working???
apparently the car doesnt have a relay for the horn, but works through a fuse that also controls the hazard lights and theft deterrent system. but i want to make sure of that
none of my manuals show a horn relay. so you need to get a voltmeter, get access to the horn, remove the connector and check for voltage while someone is pushing on the horn pad of steering wheel.
have you checked for power yet?