the horn assembly is located under nearside wing turn steering to nearside and you will see a black plastic cover inside the wheel arch remove the plastic cover and the horns are there if you run a live wire from the battery to the horns and they work then the problem is the switch/on steering wheel.if they dont work change the horns if you cant remove plastic cover then try to gain access from under very front near side of car
alan mellor, April 2006