How to Troubleshoot a horn that's not working in a 1991 Ford Ranger pickup truck
This video will help you diagnose and troubleshoot a non-working horn in a 1991 Ford Ranger pickup truck. First off, the electrical diagram is a great place to start. Make sure the horn switch is getting power from the source. To test this, all you need is power and a ground to test it at the steering wheel. To see what else could be the problem, watch and learn from a professional mechanic.