Speaker 1: Today we'll be having a look at and showing you how to install the Tow Ready Tail Light Isolating Diode System with a Four Pole Connector, part number TR118821.Here's what our diode packs look like behind our tail lights. We're looking at our passenger side one. The driver's side one looks identical. The way these work is that they get the signal from your motor home. Then it… see more >