Horn and alarm horn do not work on 1997 Volvo 850?

If the horn and alarm horn on your 1997 Volvo 850 are not working, first check the fuse related to the horn system, as a blown fuse can cause both to fail. Additionally, inspect the horn relay and wiring for any signs of damage or corrosion. If those components are functioning, the issue may lie within the horn switch on the steering wheel or the alarm system itself. Testing these components with a multimeter can help pinpoint the problem.