The latest MasterTech publication for the 2018 Wrangler shows us how to install a remote start and trailer harness kit for the JL Wrangler.
Mopar’s remote start kit — for JLs already equipped with remote keyless entry (RKE) and auto transmission, as well as the new Mopar trailer hitch wiring kit are both designed specifically for the 2018 JL and include everything needed for the installation.
Check out this installation guide for a step-by-step visual on how it’s done.