How to install a horn 1999 blazer?

To install a horn on a 1999 Blazer, first disconnect the negative battery cable to ensure safety. Remove the horn cover or grille to access the old horn, then unbolt it from its mounting location. Disconnect the wiring harness from the old horn and connect the new horn, ensuring it's securely mounted. Finally, reassemble any covers, reconnect the battery, and test the horn to ensure it works properly.