Wiring fog lights to run independently?

[HACK BLOCK]

wondering how this could be done? being able to turn on and off just the fogs when the ignition is on.

 

[wjburken]

wondering how this could be done? being able to turn on and off just the fogs when the ignition is on.

Isn’t that what the button circled in red is for or do you not have it?

 

[89Suburban]

Isn’t that what the button circled in red is for or do you not have it?
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I think what he means is if you try to hit that switch in the day time with the headlights off it automatically kicks the other lights on as well. I had this issue as well when I was messing with it one day. Can't remember if I had the Auto light function disabled. Usually that is the first thing I do when I fire her up though.

 

[wjburken]

I think what he means is if you try to hit that switch in the day time with the headlights off it automatically kicks the other lights on as well. I had this issue as well when I was messing with it one day. Can't remember if I had the Auto light function disabled. Usually that is the first thing I do when I fire her up though.

Interesting.

 

[gooffeyguy]

I know at night with it set to auto you can turn the dial to the off position to turn all lights off then hit the fog light switch and the parking lights and fog lights come on, no head lights.

Maybe you have to turn it to parking lights instead if auto after turning them all off, can't remember.

2001 Yukon SLT
2012 Yukon Denali XL
2011 Yukon Denali RIP 5/20/18

 

[89Suburban]

I know at night with it set to auto you can turn the dial to the off position to turn all lights off then hit the fog light switch and the parking lights and fog lights come on, no head lights.

Maybe you have to turn it to parking lights instead if auto after turning them all off, can't remember.

2001 Yukon SLT
2012 Yukon Denali XL
2011 Yukon Denali RIP 5/20/18

Yeah that could have been it, I can't remember now. Have to check the manual out...

 

[Doubeleive]

wondering how this could be done? being able to turn on and off just the fogs when the ignition is on.

run a toggle switch to the fog lights and then power it from accessory (key on) power that way if you forget to turn them off it doesn't drain the battery. easy to do by running power from the drivers kickpanel thru the firewall grommet. you can get all the stuff needed at almost any auto parts store.

 

[89Suburban]

I know at night with it set to auto you can turn the dial to the off position to turn all lights off then hit the fog light switch and the parking lights and fog lights come on, no head lights.

Ok I just tested it and this is exactly how it worked, both in auto and manual.

 

[HACK BLOCK]

I was thinking about having just the fogs with no parking lights on and I was also hoping to use the stock button but after thinking about it I might just run the toggle switch and stick it somewhere

 

[HACK BLOCK]

found a couple of videos but they have the parking lights come on with them

 

[HACK BLOCK]

ok so I ended up wiring the fog lights to act as the DRL. now the fogs come on just as the DRL would and still function normally when using the button

 

[HACK BLOCK]

I didn't make it permanent because I didn't use a diode but not sure if I would need it in this case. I jumped a wire from a blown DRL fuse to the fog using a spare wire I had from an old harness. do I need the diode? I do have some diodes but can't remember what number they are. and right now I don't have any crimps or shrink tubes. just a soldering kit and electrical tape

 

[kbuskill]

I didn't make it permanent because I didn't use a diode but not sure if I would need it in this case. I jumped a wire from a blown DRL fuse to the fog using a spare wire I had from an old harness. do I need the diode? I do have some diodes but can't remember what number they are. and right now I don't have any crimps or shrink tubes. just a soldering kit and electrical tape

Since you are using a blown fuse, then no diode wouldn't be necessary since it can't back feed power to the original DRLs.... even if it did, the worst that would happen is the DRLs would turn on with the fog lights.

GM runs power to most of the accessories constantly and switches them using the ground side.

 

[HACK BLOCK]

definitely won't send power towards the headlights but what about power being sent back to the bcm or whatever controls it?

 

[kbuskill]

definitely won't send power towards the headlights but what about power being sent back to the bcm or whatever controls it?

It would send power back into the power side of the fuse, which already has power constantly because it is the fuse box.

As mentioned earlier... the switches and BCM control everything by switching (turning on/off) the ground going to whatever it is... in this case the DRLs.