Dielectric Grease

I am building a RV12iS. Presently wiring the landing, nav and strobe lights with the Van's supplied molex connectors.

Should I use dielectric grease for the pin/socket connectors or leave them bare ?

You can use DE-OX on all electric connections. Don't forget the battery. It will keep air and moisture out of the connection.

This..... https://www.cesco.com/Ilsco-DE-OX-8...eg-Oxide-Inhibitor-8-oz-Bottle-Green/p2150347 is what PG&E (Pacific Gas & Electric) uses on their connections. It is applied BEFORE the connection is made, and the surface coated after the connection with a fine film like on the battery terminals.

Data sheet.... https://www.cesco.com/resources/Ilsco/DE-OX-4OZ/Specification-Sheet.pdf