I mentioned to a friend that I was going to install diodes into my Ford Edge tail lights and he asked an interesting question.
What happens when you activate the brakes in the RV and send 12 volts to the toad brake lights, and your toad braking system pushes on the brake pedal sending 12 volts to the same light. Are you feeding the toad lights from both the RV and the toad batteries simultaneously? It is my understanding that diodes limit the power to flow only to the lights and prevent back-feeding between systems. Are we now feeding 12 or 24 volts to the lights? Or are the two vehicles working in parallel?
I didn't have an answer.