Could Both Wires of 3rd Brake Light Logic Module Be Ran to Single Turn Signal Circuit

Updated 09/02/2020 | Published 09/01/2020

Question:

I have a 2020 F150 that I am trying to get the third brake light to work on the camper shell cap. I currently have the power line from the 2wire led light connected directly to the green wireright signal and stop light on the 7 pin trailer plug with no logic module. The 3rd light works with brake, but flashes when the right signal is on. It does not flash with the left signal. I tried installing your logic module on the right signal line using the green wire and only one yellow wire the result was that the brake light stopped working. My question is: If I twist the 2 yellow wires together and install it on the right signal line only, will it work without tapping into the left signal line? Thanks for your help.

asked by: Tony

Expert Reply:

The part # PP20-702 has to connect to both the left and right hand turn signal/stoplight circuits in order to separate out the stoplight. The reason that is because it waits to see voltage on both circuits at same time to then allow the stoplight circuit of it to activate. If you were to run both wires to the left blinker circuit it would basically just blink with the left blinker since it would think both blinkers are on.

expert reply by: Jameson C