Quick update. I recently added a trailer plug to Roxie the 2019 Roxor. Here are a my takeaways from my 2019.
If you get a conversion device like
this and you've rolled your on lights similar to my earlier post they won't work if you tap into the wires at the tail lights.
This lead me to make a contraption similar to the one in this
video. I wanted a cleaner look so I bought
this to put in the engine bay. When I prototyped the device I found that I needed to add diodes to each of the signal lines feeding the relays. The cathode should go to the relay. Some of
these will probably work fine, but I'm not an electrician or electrical engineer do your own calculations based on your lights power requirements.
Because I chose to put the magic box in the engine bay I chose to tap into the running lights from one of the connectors that feed the side markers. You can use something like
these quick disconnects or
these automotive connectors to tap into the running light/side marker signals on the passenger or driver sides. Tapping into the running lights here for the trailer "magic box" I found I didn't need to wire a signal wire from the brake light circuit. I'm not to sure why, but on the Roxor I have this circuit also gets activated when you press the brakes.
What about the original running lights? Well if you recall there is a plug for each running light. You only need to tap into one of them which means you have a plug with an active running light circuit that you can tap into and feed both lights from, however I figured while I'm making things mo' betta I wanted them to be turn signals too. After a bit of research I found
this forum post, detailing how one could convert two wire LED side markers into having two functions. Using some of the previously mentioned
diodes and these
resistors I was able to replicate what was posted and now my side markers function as both running lights and additional turn signals.
