Background: I am working on adding a third brake light to the back of my new 5th wheel travel trailer (doesn't have one from factory). I will be using a 15" LED light bar mounted between the two stock tail lights. Diagram of how I wired it in is shown below.
Challenge: Since tapping into only one of the brake light circuits (right side or left side only) for power to the new 3rd brake light would result in the 3rd brake light becoming a turn indicator when the turn signal is activated to the stock brake light from which the new 3rd brake light is getting its power, I have tapped into both right and left side stock brake light circuits in order to provide constant 12v power to the new 3rd brake light when the brakes are applied AND one the turn signals is activated. This works, with one small glitch. When the brakes are applied AND one of the turn signals is activated, the new 3rd brake light properly illuminates as a brake light, but it has a very slight pulsing action that corresponds with the blinker cycle from the turn indicator.
Question: Is there any sort of resist or or something similar that I could wire into the circuit feeding power from the two stock brake lights to the new 3rd brake light that would eliminate this pulsing from the slight variation in the voltage due to the on/off blinker cycle on one side or the other?
Challenge: Since tapping into only one of the brake light circuits (right side or left side only) for power to the new 3rd brake light would result in the 3rd brake light becoming a turn indicator when the turn signal is activated to the stock brake light from which the new 3rd brake light is getting its power, I have tapped into both right and left side stock brake light circuits in order to provide constant 12v power to the new 3rd brake light when the brakes are applied AND one the turn signals is activated. This works, with one small glitch. When the brakes are applied AND one of the turn signals is activated, the new 3rd brake light properly illuminates as a brake light, but it has a very slight pulsing action that corresponds with the blinker cycle from the turn indicator.
Question: Is there any sort of resist or or something similar that I could wire into the circuit feeding power from the two stock brake lights to the new 3rd brake light that would eliminate this pulsing from the slight variation in the voltage due to the on/off blinker cycle on one side or the other?