Hi everyone, I am new to this forum and I have a question. I am currently doing the 2019 to 2020 front end conversion and I have read the forum. Great info. What I cannot find is, why do we have to buy a harness if we are going from led to led? Does anyone know if I can just swap a pin or wire to make this work instead of buying a 400.00 harness? Thank you all for the help.