My 2017 blew up so I bought a 2021 last April. Stock for now until I have BaderBuilt operate on it ---
The harness I used is the 2018+ STI Heavy Duty Fog Light Harness (Prolightz Canada). The harness is plugged into low beam fuse slot as it has add-a-fuse. YouTube search Prolightz fog install to see the cable. Plug-n-Play two relays wired into cable - wires in cloth braid to protect them. Very nice product.Did you do a standalone wiring harness for your fogs? I've been wanting to set mine up using the factory wiring. I know the car is wired for them, it's just finding where the wires are that I'm struggling with. As far as I'm concerned, no one makes a pigtail that allows you to plug in fog lights. I'm torn between two options. There's a plug behind the bezel where the trunk release is and I've heard that it's for fog lights, however I also know that the newer WRX's had their fog lights mounted to the blinker lever as well as the headlights. Sorry for so much typing. Just curious as to what you did and wanted to bounce my idea off of you.