DRL and fog lights on together?
03-16-17, 04:18 AM
#1
Driver School Candidate
Thread Starter
Join Date: Feb 2017
Location: New Jersey
Posts: 16
Likes: 0
Received 0 Likes
on
0 Posts
DRL and fog lights on together?
Hey guys, i have a 2016 IS300 NON F-sport, and i was wondering is you can keep your DRL lights on with your fog lights...from what i tried, you can only do parking lights and the fog lights stay off.. any input on this?
03-16-17, 02:13 PM
#4
Lexus Test Driver
Join Date: Feb 2017
Location: Richmond Hill, Ontario, Canada
Posts: 6,260
Received 1,732 Likes
on
1,368 Posts
If I'm understanding this correctly, vodee3is wants the fog lights to be on with the DRL only, and not the Park lights and headlights.
Being in a 2104 IS250 F-Sport myself I don't have fogs, but my other vehicle (2014 Toyota Highlander) does have factory fogs.
In that vehicle the fog lights only come on when the headlights are on. If only the DRL and/or Park lights are on, the fog lights won't come on even if the switch is set to the ON position.
I guess the rationale is that if you need the extra light to see from the fog lights, then you should have your headlights on already.
I believe that vodee3is is going for an aesthetic look rather than functionality.
I think a creative look at the lighting wiring diagram will reveal a way to make the fog lights think the headlights are on, without actually having the headlights on.
At the end of the day the fog lights are looking for an input that says the headlights are on...it doesn't mean they actually need to be on.
Being in a 2104 IS250 F-Sport myself I don't have fogs, but my other vehicle (2014 Toyota Highlander) does have factory fogs.
In that vehicle the fog lights only come on when the headlights are on. If only the DRL and/or Park lights are on, the fog lights won't come on even if the switch is set to the ON position.
I guess the rationale is that if you need the extra light to see from the fog lights, then you should have your headlights on already.
I believe that vodee3is is going for an aesthetic look rather than functionality.
I think a creative look at the lighting wiring diagram will reveal a way to make the fog lights think the headlights are on, without actually having the headlights on.
At the end of the day the fog lights are looking for an input that says the headlights are on...it doesn't mean they actually need to be on.
03-16-17, 04:03 PM
#6
Lexus Test Driver
Join Date: Feb 2017
Location: Richmond Hill, Ontario, Canada
Posts: 6,260
Received 1,732 Likes
on
1,368 Posts
I think your coworkers are correct...a separate relay, switch, fuse, and wiring to the existing fog light wire from the controlling ECU is the only way.
You could hook it up in a way that it would function normally as intended with the new fog light switch in the OFF position, but then you could flip that switch and the fogs would come on.
It was a good thought and would probably look pretty cool, but damn it's like work.
03-16-17, 04:13 PM
#7
Instructor
The fog lights are controlled by an ECU that is controlled by the Main Body ECU...By time you bypass everything to make them work it's going to be a mess.
I think your coworkers are correct...a separate relay, switch, fuse, and wiring to the existing fog light wire from the controlling ECU is the only way.
You could hook it up in a way that it would function normally as intended with the new fog light switch in the OFF position, but then you could flip that switch and the fogs would come on.
It was a good thought and would probably look pretty cool, but damn it's like work.
I think your coworkers are correct...a separate relay, switch, fuse, and wiring to the existing fog light wire from the controlling ECU is the only way.
You could hook it up in a way that it would function normally as intended with the new fog light switch in the OFF position, but then you could flip that switch and the fogs would come on.
It was a good thought and would probably look pretty cool, but damn it's like work.
Trending Topics
03-16-17, 04:26 PM
#8
Lexus Test Driver
Join Date: Feb 2017
Location: Richmond Hill, Ontario, Canada
Posts: 6,260
Received 1,732 Likes
on
1,368 Posts
If you purchased the harness and switch from an aftermarket JDM supplier like iJDMTOYS, you could hook that up to the fog lights using their harness and switch.
Depending how you hook up that harness you could disable the factory fog switch, or leave it so both switches work, but just function differently. The OEM switch would function as per spec and the other switch would just be an on/off.
03-18-17, 10:35 AM
#12
Lexus Test Driver
Join Date: Feb 2017
Location: Richmond Hill, Ontario, Canada
Posts: 6,260
Received 1,732 Likes
on
1,368 Posts
@vodee3IS - Last thought on this one.
On the iJDMToys website, they have a video of how to wire their F Sport fog lights up to the DRL above in the bumper.
If you hooked them up this way, then the fogs would come on with the DRL, and the Park lights can be turned on as you like...and the headlights don't need to be on.
The downside is that the fogs are always on with the DRL and there is no way to shut them off without turning the DRL off.
On the iJDMToys website, they have a video of how to wire their F Sport fog lights up to the DRL above in the bumper.
If you hooked them up this way, then the fogs would come on with the DRL, and the Park lights can be turned on as you like...and the headlights don't need to be on.
The downside is that the fogs are always on with the DRL and there is no way to shut them off without turning the DRL off.
09-20-19, 03:37 PM
#13
Driver School Candidate
01-30-20, 12:14 PM
#14
Driver School Candidate
Join Date: Jan 2020
Location: PA
Posts: 1
Likes: 0
Received 0 Likes
on
0 Posts
Foglights w DRLS
BUMP...Did anybody figure this out? I purchased the idmtoys H11 Relay Harness but I havent started the install cause I dont know what Im doing...
I have the NON Fsport 3IS and want to achieve the look vodee3IS is attempting
https://store.ijdmtoy.com/products/w...adapter-aa1109
I have the NON Fsport 3IS and want to achieve the look vodee3IS is attempting
https://store.ijdmtoy.com/products/w...adapter-aa1109
