Caterpillar 3903524C91 Electrical Horn Assembly is a low‑note electric horn with mounting brackets designed for heavy‑duty equipment and International/Navistar trucks. This 12V DC horn is listed as a replacement for 3523179C91 and is cataloged under 3903524C91, with documented use on International/Navistar S Series Medium & Heavy Duty models, including the 4000 & 8000 series and the 9370 & 9670 trucks. The bracketed horn assembly provides audible warning for demanding industrial vehicles and integrates with standard 12V electrical systems, offering straightforward installation on compatible IH/Navistar platforms.
