IS - 3rd Gen (2014-present) Discussion about the 2014+ model IS models

Fog lights not working

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Old Mar 11, 2025 | 10:05 PM
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Default Fog lights not working

Purchased a 2014 is 350 AWD recently and saw my fog lights weren't working. I decided to get a new set of bulbs but they still didn't work. I have looked through the fuse boxes and it doesn't mention anything about a fog light fuse. Not sure where to go from here, any help would be appreciated
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Old Mar 12, 2025 | 07:20 AM
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Looks like it says FOG to me. Driver side footwell fuse box.
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Old Mar 12, 2025 | 08:21 AM
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Originally Posted by Wajih
Purchased a 2014 is 350 AWD recently and saw my fog lights weren't working. I decided to get a new set of bulbs but they still didn't work. I have looked through the fuse boxes and it doesn't mention anything about a fog light fuse. Not sure where to go from here, any help would be appreciated

Here is. Second row from the bottom. Good luck.
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Old Mar 12, 2025 | 12:58 PM
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Originally Posted by Gugi53

Here is. Second row from the bottom. Good luck.
I checked the fuse and it looked good to me but decided to change regardless. The fog lights still wouldn't turn on. One thing I read online was to see if there was a relay noise when switching the fog light switch on. I noticed there wasn't any on mine. What should i do here? Thanks for the help.
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Old Mar 12, 2025 | 01:38 PM
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Since you are a new owner, just want to make sure it’s not a procedural error. The fog lights only work if the headlight low beams are on. From the manual:

Fog lights can be used when

The headlights are on in low beam.
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Old Mar 12, 2025 | 02:45 PM
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Originally Posted by kj07xk
Since you are a new owner, just want to make sure it’s not a procedural error. The fog lights only work if the headlight low beams are on. From the manual:

Fog lights can be used when

The headlights are on in low beam.
can confirm i'm trying fog lights with low beam headlights.
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Old Apr 1, 2025 | 10:44 AM
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Originally Posted by Wajih
I checked the fuse and it looked good to me but decided to change regardless. The fog lights still wouldn't turn on. One thing I read online was to see if there was a relay noise when switching the fog light switch on. I noticed there wasn't any on mine. What should i do here? Thanks for the help.
are you able to access & see the wiring for the relay? i recently set up fogs on mine and ran into a similar issue. you should start with tracing the wires plugged into the 30 and 86 pins to make sure nothing's damaged. are the fog lights aftermarket? if so that's prob your best place to start. for my setup pin 30 is a positive wire from the relay connected to a 15amp fuse leading to the + battery terminal, as well as splitting off and connecting back into the switch/button for the fog lights themselves. pretty sure others have it tapped into the DRLs or headlight power instead tho. then for pin 86 is the positive wire from the switch back to the relay. after you verify those are good i'd probably check the wiring from the fog lights to make sure they're plugged in positive to positive and negative to negative and check the wiring from there to pin 87 on the relay is good too. and lastly for pin 85 just make sure your ground connections (i.e. for the relay, and for the fog lights themselves) are good
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