There's no horn relay in that wiring diagram you posted. The horn is actuated by the switch providing a direct ground to complete the horn circuit. The horn feed is always hot and the horn button provides the ground to complete the circuit.
A horn relay would have a battery feed, a switched hot [wire out to the horn (which is grounded), and a wire to the horn button which grounds the relay coil to pull in the contacts.
Last edited by klhansen; 08/03/2025 7:52 PM. Reason: fixed fumble fingers
