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I figured out the turn signal wiring! The Grand Touring and Signature headlights require 2 constant 12v inputs for each side of the front turn signals which the Sport and Touring harness is missing. What I did to test this theory was wire an always on 12v to the 2 wires- white/black wire and...

The diagrams below shows the electrical flow that activates the right turn signal. As you can see, in the AFS headlights, it has an additional gray wire, labeled GY(F), compared to the non-AFS headlights. I tried adding a wire connection from the white/red, labeled as W/R, to where the missing...

Swapping to the GT headlights might be easier than we thought! Check out my thread, it's almost plug and play but requires some work to get the turn signals to function...

Swapped my Touring headlights with the Grand Touring ones on my 2018 CX-9. Everything including the LED DRL works except the turn signal and adaptive lighting. I also created a thread to track my progress on this project, feel free to chime in...

Hi guys, I'm undertaking a project to replace the boring Touring headlights on my CX-9 with the Grand Touring/Signature headlights. I plan on documenting everything as this will probably also apply to the CX-3, CX-5, and maybe even the Mazda6 and Mazda3. The headlight swap/upgrade from...