Fog Light Install Question - Should Be a Piece of Cake for YarisWorld Veterans

[CTScott]

Originally Posted by Tomatogrower

Thank you! The way I wired it this afternoon was:
-I connected the foglight power wire (white with brown clip) to the constant 12V source
-I connected the switch illumination wire (red with white clip) to the parking lights.

This configuration worked fine temporarily; the switch illuminated when the parking lights were on and the fog lights turned on when the switch was activated.

However, when I put the plastic casings back into place, the parking lights had issues. They will not turn on, which in turn doesn't illuminate/power the switch, so the fog lights won't activate.

Any thoughts? Does grounding at different grounding points affect anything? I checked the fuse, and it was still good. It seems like there may be an issue with the grounding or my tap splice with the parking lights...

Thanks, you've been a big help! I greatly appreciate your patience with this!

Check the TAIL fuse in the fuse panel under the bottom of the dash. I have a feeling that the red wire was actually the power wire, so you were pulling the power for the fogs from it.