Originally Posted by SmokinJoe
Just set up and built one myself for our summer NW USA tour.
I've attached the Dauntless instructions for the LT hook up.
Unless you mount separate brake lights you will need a diode type adapter to go from 5 wires to 4. I simply installed 2 parallel LED brake lights on top of the tail lights and connected to the RED wire, much better visual braking effect.
I also ran and suggest the BOSH isolation relay kit to prevent any possible short to the delicate electronics. This powers the trailer from the battery through the relay contacts, the LT's brake/tail lights only send the control signal to the appropriate relay's coil.
No more than a 10 amp fuse is needed.
I have the directions, but it does not tell you one way or another how to convert it. To be honest...I am just about fed up with the trailer to begin with... I have poured countless hours in the sanding, priming, painting, new stainless screws, new wires from rear to front, new trailer plugs,...etc. At the end of the day and about and additional 300.00 later...it is just about to stress me to the point I leave the POS in the garage...
I have the isolator package bosch relay etc. that you mention....that really has nothing to do with the trailer stop lamps operation...it just pulls the power from the battery rather than the circuit...if I am correct anyway.
So, the ONLY thing I can think of doing is running 4 diodes into the trailer portion of the connection plug in series with the current. Running off of the stop lamp port to the two turn signal ports..again with Diodes in Series...and this should solve any backflow issues. As long as the diodes do not fail....if they did...it could be detrimental to the system.
If THAT doesn't seem right....or will work...then I am out of ideas. Other than putting new lights, running new wire..etc.
I am about 2k into this trip more than I want to be...and I haven't left yet!!! Making me now have to second guess EVERY single penny along the way.
As you can tell.... a little stressed!