Always on fog lights for 2010 Package 5 (led headlights)

I know it's really not the answer you're looking for, but you could just turn the parking lights on to enable you to drive with fog lights on without having headlights on during the day.

2012+ models actually have LED DRL's located where your wife's car has its fog lights. They're not considered "fog lights" per se, so they're wired completely differently in newer models and you can't really reconfigure them easily. It's certainly beyond me at least.

 

It could be done, but you'd need to rewire your factory foglights and use a relay.

I used my oem user installed foglights as DRLs previously, but the foglights are less than ideal for the following reasons:

They get very hot. A 55w halogen bulb in a small enclosure, used during daytime conditions.

They are recessed into the lower bumper. This limits visibility to the front and since they are mounted low, they aren't as visible as higher mounted DRLs.

I ended up installing a DRL module that uses the oem highbeam bulbs at reduced power, like many vehicles out on the road. Advantages are: operate at reduced power for less heat in a larger housing, heat is readily dissipated through the large headlight lens. The highbeam lights are mounted higher than foglights, so they are more visible. They disperse the light at a wider angle than the recessed foglights.

No other lights are on, such as when driving with the parking lights or lowbeam headlights on.

Link is in my sig below for my DRL installation.

SCH-I535