how to turn on fog lights while headlights are off?
Thread Starter
Lexus Test Driver
Joined: Mar 2001
Posts: 1,108
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From: California
how to turn on fog lights while headlights are off?
guys.....how do i saparate the Headlights and the Fog lights??
for example..i want to turn on the fog lights while the headlights on off....
for example..i want to turn on the fog lights while the headlights on off....
Lead Lap
Joined: Nov 2002
Posts: 404
Likes: 0
From: California
Re: how to turn on fog lights while headlights are off?
Originally posted by kyle3481
guys.....how do i saparate the Headlights and the Fog lights??
for example..i want to turn on the fog lights while the headlights on off....
guys.....how do i saparate the Headlights and the Fog lights??
for example..i want to turn on the fog lights while the headlights on off....
you gotta install a switch and route the fogs to it instead of through the headlights and such. no easy, but not too hard either. someone did it, perhaps hi98gs. try a search perhaps, might find it
i am talking about theory here but....
it depends on how you wanna turn on the fogs. when you turn on the headlight, you click your switch twice, first time to turn on the parking lights, second time to turn on headlight/foglights. the fog lights doesn't turn on until second click coz' it sense the second clicks together with headlight so that's why it works the way it is.
but if you can bypass second switch on the fogs and connect it to the first click, you will be able to turn on the fogs when you do one click and turn on the parking lights.
i know that can be done, at least on acura. on my tl-s, i just need to unplug the fog wires and wire it with another fuse (10 mins job) and it will turn on with my parking lights instead of headlight. so when i do one click, parking lights and fogs on, second time headlight on.
i am not 100% sure how that should be done on the lexus (gs, sc, etc...) coz' fuse values might be different but the wiring methodology should work.
but keep in mind, in a lot of states it's illegal to turn on fogs when headlight is not on
it depends on how you wanna turn on the fogs. when you turn on the headlight, you click your switch twice, first time to turn on the parking lights, second time to turn on headlight/foglights. the fog lights doesn't turn on until second click coz' it sense the second clicks together with headlight so that's why it works the way it is.
but if you can bypass second switch on the fogs and connect it to the first click, you will be able to turn on the fogs when you do one click and turn on the parking lights.
i know that can be done, at least on acura. on my tl-s, i just need to unplug the fog wires and wire it with another fuse (10 mins job) and it will turn on with my parking lights instead of headlight. so when i do one click, parking lights and fogs on, second time headlight on.
i am not 100% sure how that should be done on the lexus (gs, sc, etc...) coz' fuse values might be different but the wiring methodology should work.
but keep in mind, in a lot of states it's illegal to turn on fogs when headlight is not on
Lexus Test Driver
Joined: Feb 2002
Posts: 831
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From: New York
Originally posted by rominl
i am talking about theory here but....
but if you can bypass second switch on the fogs and connect it to the first click, you will be able to turn on the fogs when you do one click and turn on the parking lights.
i am talking about theory here but....
but if you can bypass second switch on the fogs and connect it to the first click, you will be able to turn on the fogs when you do one click and turn on the parking lights.
I know that I've done it on other cars of mine by just splicing the wires and presto!! But then again this is a Lexus.
"D"
Originally posted by dagr8tsthustla
I think this was posted already...you gotta do a search b/c i think it was said that it could be done but not too sure....i think that some people were skeptical about the whole process.
I know that I've done it on other cars of mine by just splicing the wires and presto!! But then again this is a Lexus.
"D"
I think this was posted already...you gotta do a search b/c i think it was said that it could be done but not too sure....i think that some people were skeptical about the whole process.
I know that I've done it on other cars of mine by just splicing the wires and presto!! But then again this is a Lexus.
"D"
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Lead Lap
Joined: Nov 2002
Posts: 404
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From: California
Driving with side marker lites and fogs no headlights is one of the riciest moves I can think of, except spinners. No offense, but this is a Lexus!
Just say no!
Just say no!
Last edited by Ex996; Feb 3, 2003 at 10:12 PM.
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well not sure i would agree on this one. in fact a lot of european luxury cars allow that coz' it's legal there. for example if you get a bimmer you should be (at lesat in the prev gen) able to turn on fogs and parking lights but not headlight. i kinda like the look sometimes 
Lexus Champion
Joined: Feb 2002
Posts: 1,772
Likes: 1
From: California
Originally posted by JAC JZS
umm, did you read the link I posted
He goes into great detail on how it is done.
umm, did you read the link I posted He goes into great detail on how it is done.
Lexus Champion
Joined: Feb 2002
Posts: 1,772
Likes: 1
From: California
Originally posted by rominl
no i read it, but more detailed stuff like which exact fuse, how the new switch is wired, etc... is still missing. i have been waiting for more pics since then actually
no i read it, but more detailed stuff like which exact fuse, how the new switch is wired, etc... is still missing. i have been waiting for more pics since then actually
Last edited by JAC JZS; Feb 4, 2003 at 01:06 AM.
Driver
Joined: Oct 2002
Posts: 176
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From: IL
What I want to know is which wire is it that triggers the fog light relay that is in the headlamp switch. Where can I find it with ease? If I can locate this wire and determine if it goes negative or ground when the stock fog switch is turned on it would be very easy to wire in your own 12v relay and make this mod work with the factory switch. I have also attempted to modify the stock relay without success, I don't know why my mod did not work but works on the IS !!!!