I basically only suggest where to install your trumpet horn on a 2021 ram 1500.
If you need wiring instructions message me
www.amazon.com/Inline-Fuse-Holders-Gauge-Waterproof/dp/B07XWPP6PM/ref=pd_ybh_a_6/141-9681650-3360237?pd_rd_w=yFY4c&pf_rd_p=48b4f440-2099-4e34-afeb-210417d3bf51&pf_rd_r=8MENRZTETP5Y7C4ADY56&pd_rd_r=d65e55fa-d371-4bd0-b024-b888e6d5cfe1&pd_rd_wg=44kLS&pd_rd_i=B07XWPP6PM&th=1
www.amazon.com/Ehdis-Relay-40amp-Spst-Model/dp/B01J53IH5M/ref=pd_ybh_a_7/141-9681650-3360237?pd_rd_w=yFY4c&pf_rd_p=48b4f440-2099-4e34-afeb-210417d3bf51&pf_rd_r=8MENRZTETP5Y7C4ADY56&pd_rd_r=d65e55fa-d371-4bd0-b024-b888e6d5cfe1&pd_rd_wg=44kLS&pd_rd_i=B01J53IH5M&psc=1