My wife got a 2015 CX-5 Sport a few months ago and I'd like to add fog/driving lights to it. I checked last night, and it has wiring harnesses on the backs of the dummy grilles where the lights would mount. For anyone who has done this upgrade before, are the harnesses already fully wired to a fuse and relay or would I need to add them? I know I'd need to install the factory fog light switch from another CX-5 (unsure of part number) or wire up an aftermarket one.

I'm a car guy but pretty new to Mazda. Thanks for any advice.

 

The best way to do this is use a FSM (factory Service manual) for your model and year. Then look up replacing fog light assembly. Then look up replacement fuse. Then look up replacement fog light switch This way you will get the best information from the start. .
Go to Mazda parts.com and you can find the exact OEM part numbers for the project.
For you year it is a easy service for an experienced DIY (car guy/gal)

 

This is exactly how I'd say it too. Not really many parts involved, but I would think that the front bumper would need to come off. With oem parts or high quality third-party it should be plug and play for the most part.

 

DIYs tend to break parts when they do simple project that require removing to many body parts.... LOL

 

Checking the manuals is a good way to go. I haven't gotten around to buying the manuals for it, but I intend to. I have them for our other vehicles and don't need them for most jobs, but wiring diagrams and details like bolt torque specs come in handy sometimes.

I don't break the actual parts, but I keep a healthy supply of spare fasteners around. I did a clutch job on my stepson's car over the summer and had to pull off most of the plastic splash shield, so I replaced about a dozen clips and push fasteners just because the old ones were getting brittle.

Based on what I saw with my scope, I think I can access the wiring harnesses and dummy bezels without removing the bumper, IF I can fit my hand in there.

 

Let's just say I leave stuff like that for the professionals lmao. I would definitely break some clips for sure if I did it myself .