Whether you choose to operate your towed vehicle lights with a
bulb-and-socket kit or a diode kit, you will need a cord to connect
electrically between the towed vehicle and the motorhome. Roadmaster
wires are water, oil, and chemical-resistant, and the plugs are injected
with silicone to prevent corrosion.
Straight cords may be used with any tow bar, but they are best used with ROADMASTER All Terrain tow bars with cable channel guides. (the cords come with one end not wired, so that it may be threaded into the channel guide).