Q: What is the first thing to check if the horn is not working on Buick Skylark,Oldsmobile Omega and Pontiac Phoenix?
A: To troubleshoot a car horn, check the fuse first. If it's intact, use a jumper wire to connect a 12-volt source to the wiring terminal on the horn. If it sounds, it's likely a problem with the circuit before the horn. If it does not blow, the problem may be with the grounding of the horn or the horn itself. Other possible issues include bent metal contacts on the actuator or faulty wires. When replacing the relay, be careful not to short the threaded stud to the ground as it could damage the vehicle.