24 ford explorer st

[Dirtblaster]

Why do the fog lights only come on when it's dark?

 

[RFC1992]

Typically, they only light in conjunction with the headlamps. If your headlamps are on automatic (light-sensing) mode, then they will be off and the fog lamps will be off too. Try switching the headlights on manually and see if your fog lamps operate.

 

[2020FordRaptor]

Why do the fog lights only come on when it's dark?

They can come on with the parking lights or headlights. The won’t come on with the Auto settings in the Day due to federal regulations about no DRLs with any other headlight or fog light lighting. That’s why the white strip gets dimmer when the headlights are on.

 

[hbalek]

They can come on with the parking lights or headlights. The won’t come on with the Auto settings in the Day due to federal regulations about no DRLs with any other headlight or fog light lighting. That’s why the white strip gets dimmer when the headlights are on.

Also, the white strip goes off when the turn signal is used for same regulations.