Anti-Theft Horn Operation

Turn ignition off. Locate anti-theft horn and disconnect horn 2-pin connector. Connect battery positive lead to one terminal. Connect battery negative lead to other terminal. If anti-theft horn does not blow, replace horn. If anti-theft horn is okay, repair open or short in harness or connectors between HAZ/HORN fuse and ATS ECU as necessary. If harness and connectors are okay, replace ECU and retest.