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Discussion Starter · #1 ·
I have factory fog lights on my Tundra SR5 and they worked fine before I installed LED headlights (plug n play).
The fogs came on if the low beams were on and the switch was turned on. The LED headlights work fine in low-beam, hi-beam, and flash hi-beam modes. After I installed the LED headlights, when I turn on the fog lights the headlights go to hi-beam, but the fog lights do not come on at all in any position. Even if I unplug the LED headlights, the fog lights don't come on at all. The fog light fuse is good, but there is no indication the relay is working.
How does the fog light switch go from controlling the fog lights to switching the headlights to hi-beam? Did the fog light relay go out coincidentally, or is there something else going on? I didn't go under the dash at all.

Any help is appreciated.
 

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Ran into the same issue with ours. A set of resistors should take care of it. Details here:


Hope that helps!
 
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