Adding fog light

More than likely it will not make them work as it was an extra cost option. The switch relay and the fuses could all be added in but then you would likely need to have a dealership program the body control module with the sales option code to actually make them work.

You could test to see if they would work without installing everything though. You would need to access the wiring on the rear of the headlight switch and find the Gray wire with a Violet stripe. That is the fog lamp control wire. To tell the BCM you want them on you would turn on the low beam headlights and then ground that wire. Now to see if the system actually activates them you need to find the fog lamp relay in the junction box in the left side of the engine compartment. It is in the bottom row and may be missing as you don't have them. The socket will look like the picture. If you have another relay you can simply plug it in, then have someone put the ground wire at the switch on and off a ground spot while you listen and feel the relay, if you hear and feel it clicking on and off as the wire is grounded, you could add the lights, switch and fuses 19, 35 and 36 to send power to the lights. If you don't hear or feel the relay clicking the BCM would need to be programmed to make the system work as designed using the factory switch.

If the tests work then they should. There is a way to add them in without the BCM but it requires adding a couple of other relays and wiring to make them work correctly.

These are the wiring diagrams. It is possible that they populated all the small parts but never turned the fog lights on in programming. That happens a lot these days as they use the same fuse panels and wiring across all of the versions of a particular model, then turn on the wanted options in the programming. It's one of the reasons that they use the smart fuse panels. They can just turn things on and off using the option codes.