Fog lights tapped into headlights
Thread Starter
Instructor
Joined: Feb 2020
Posts: 242
Likes: 26
Fog lights tapped into headlights
Hey all, I want to install some yellow fog lights behind the grill on my car. That's the easy part, what I'm having an issue with is trying to tie them into the headlights. I just want to run a signal wire from them to a relay to power the led lights, not leach power from the headlights. Anyone have experience doing something like this or have an idea of how to do it? Thanks for the help.
Thread Starter
Instructor
Joined: Feb 2020
Posts: 242
Likes: 26
The problem I have with having them on their own switch is I really don't want to modify/damage the interior. I have a hard time doing that on a car I paid so much for, my usual 5k dollar vehicle I have no issue with doing that, but it hurts a bit more when the car was by far and away the most expensive car I've ever bought.
That being said, I did find the diagram for the factory relay switch wire that turns the headlights on and off and I'm thinking I might just splice into that wire to trigger the relay for these fog lights.
That being said, I did find the diagram for the factory relay switch wire that turns the headlights on and off and I'm thinking I might just splice into that wire to trigger the relay for these fog lights.
Drifting
Joined: Dec 2019
Posts: 1,816
Likes: 616
From: Blacksburg Va
I'd drop the switch our of Angry's diagram and run the green wire to a power lead for low beams. In theory there could be times when you would be better off w/ just the fog lights and neither hi nor low beams on. But in the two states I have been involved in annual safety inspections in, that was not allowed.
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Thread Starter
Instructor
Joined: Feb 2020
Posts: 242
Likes: 26
I'd drop the switch our of Angry's diagram and run the green wire to a power lead for low beams. In theory there could be times when you would be better off w/ just the fog lights and neither hi nor low beams on. But in the two states I have been involved in annual safety inspections in, that was not allowed.
