Factory Fog Light Switch

[Inlinejohn]

I personally am going to use the rear fog switch for lights that are integrated into the RC rear bumper I plan on getting. Figured this would be a good use for that IF the lights are actually wired back to that location on my WT.

The dual Fog switch is truly a dual/separate switch for each light…correct? So if you turn on front it does not turn on rear. If so, which I suspect it is, then I too will use this dual/Rear for bumper mounted pod lights in my JCR rear bumper. Has anyone determined the wiring does or does not exist in the rear for lights?

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[mblur05]

I got mine today, now I am trying to figure out which wires are for the front fog, and which are for the rear in c203 location. Ideally I want to use one fog switch front for the white light, and the rear fog switch button for the yellow, this should be possible? Anyone do this yet and have pictures?
Also is a fuse required for the rear factory fog light switch?

See my post on page 63, links and pics available. There are other posts showing the rear fog wire is white/blue that goes to the rear as well. Everything is mentioned on here, just read and do the research.

https://www.bronco6g.com/forum/threads/factory-fog-light-switch.22937/post-1872637

 

[Gotchaa]

If your bronco didn't have fogs or sensors originally, you're going to have to go back to C203, Wich is a large harness connector inside the driver's fenderwell... Take the liner out of the driver's side, and look up on the frame horn that runs immediately under the fusebox/battery area... the connector is the large one in this photo;

The two wire connector you see is the one I added for mine, you need to splice the wires going to pin 48 and 43 of C203, 48 is a yellow/orange wire to the + right light, and 43 is brown, to the left light. you just need to ground the other wires from the fog lights.

I assume there are 2 wires for left and right to allow for right/left blinking forscan programming but only one for the rear?

has anyone actually connected to the rear yet with the foglight switch that supports the supports front/rear

 

[Gotchaa]

See my post on page 63, links and pics available. There are other posts showing the rear fog wire is white/blue that goes to the rear as well. Everything is mentioned on here, just read and do the research.

https://www.bronco6g.com/forum/threads/factory-fog-light-switch.22937/post-1872637

Yes I have been reading your posts as well as many other threads. Before I start splicing I am trying to make sure I have all the proper pig tails, harnesses, and factory fog switch for front/back fogs. I don’t think anyone has done both yet. So I am trying to figure out if there is going to be an empty fuse position somewhere I need to put in to use the rear fog light position on the switch since this is a euro feature I am highly suspect that it would be populated already. Or maybe the fog switch module itself is fused and I don’t need to worry?

I am just putting in Front fogs that have white and amber connectors and want to be sure this will work with the dual fog factory light switch. I have already ran forscan, now it’s just the switch module swap out and wiring.

 

[zuke]

Yes I have been reading your posts as well as many other threads. Before I start splicing I am trying to make sure I have all the proper pig tails, harnesses, and factory fog switch for front/back fogs. I don’t think anyone has done both yet. So I am trying to figure out if there is going to be an empty fuse position somewhere I need to put in to use the rear fog light position on the switch since this is a euro feature I am highly suspect that it would be populated already. Or maybe the fog switch module itself is fused and I don’t need to worry?

I am just putting in Front fogs that have white and amber connectors and want to be sure this will work with the dual fog factory light switch. I have already ran forscan, now it’s just the switch module swap out and wiring.

To answer all the recent questions;

The BdyCM that the wires come from acts a circuit breaker, If it sees an overdraw on the circuits, it cuts the power to the circuit, there are no fuses in the circuit.

There are separate wires for left and right in the front for multiple reasons. The main reason is to allow the computer to report which one is out if one stops working, It also allows them to be programmed differently since forscan has separate entries for left and right you can program their behavior differently. Finally, it separates the load, The wiring is really only thick enough guage for one light with a safety margin.

I haven't played with the rear fog light wiring, and don't plan too, But in the wiring diagram in my post, you can see that it doesn't go through C203, so it can't be tapped into from there. Instead it goes to Pin 11 of connector C410, Which I'm sorry, but I don't know where that one is...

 

[Gotchaa]

To answer all the recent questions;

The BdyCM that the wires come from acts a circuit breaker, If it sees an overdraw on the circuits, it cuts the power to the circuit, there are no fuses in the circuit.

There are separate wires for left and right in the front for multiple reasons. The main reason is to allow the computer to report which one is out if one stops working, It also allows them to be programmed differently since forscan has separate entries for left and right you can program their behavior differently. Finally, it separates the load, The wiring is really only thick enough guage for one light with a safety margin.

I haven't played with the rear fog light wiring, and don't plan too, But in the wiring diagram in my post, you can see that it doesn't go through C203, so it can't be tapped into from there. Instead it goes to Pin 11 of connector C410, Which I'm sorry, but I don't know where that one is...

Make sense. wouldn’t the wiring from the factory switch for front/rear need to be there for this to work. I replaced the switch and wasn’t sure what wires on the harness plug for the factory light switch would be for Front fogs/rear…

 

[Gotchaa]

With those deciding to use dual Fog switch, what lights are you choosing to install in the rear that would not blind people following? I wonder if Rear Fog could be used for Chase light??

I have the Mabatt raptor style lights, there are 2 in each pod, with amber and white coming off their harness. My plan was to use C203 for the front white fog, and route the amber to C424 rear Fog. So both lights are in the front, not using back fogs.

 

[zuke]

Make sense. wouldn’t the wiring from the factory switch for front/rear need to be there for this to work. I replaced the switch and wasn’t sure what wires on the harness plug for the factory light switch would be for Front fogs/rear…

The switch doesn't work the way your would expect, I don't believe it has individual wires for every function, I believe it's a binary word feeding back to the body control module, so it can a encode 32 different combinations on the five wires it has.

I don't know any of that for sure though, it's just a guess..

 

[akerman1]

I am getting a solid ground. No power to the lights, but power to the switch I have a guy that can do the forescan in Vegas, but need the layout for him. Do you have that?
I had a ford guy do it, but I think he only did the switch, and not the bcm part that is my guess any help is appreciated, and needed thanks

Did you ever get this figured out? I’m having a similar issue.

 

[zuke]

Finally getting around to adding some fogs with factory switch.
Enabled via Forscan
Mod made to BdyCm 726-42-01

Fog indicator on dash works…
No fog power. Any suggestions?
Thanks for any help.

Did you try "Fog Only" rather than "DRL and cornering"?

 

[Gotchaa]

The switch doesn't work the way your would expect, I don't believe it has individual wires for every function, I believe it's a binary word feeding back to the body control module, so it can a encode 32 different combinations on the five wires it has.

I don't know any of that for sure though, it's just a guess..

So I was able to find the harness and wires for the right/left front fogs in C203, but it is unclear to me how it would work with the fog light harness I have for the mabett raptor style lights.

Essentially the fog lights have two wires one for amber one for white. They go into a why connector, come out with 3 wires, one for ground, one for amber, and one for white, these are for both left and right fogs. The amber light wire I have sent to aux6 switch for now and confirm that works fine.

Now I am left with the white wire to run to the factory fog light switch. So this is one wire, if I run this over to C203, what connector would I be using? I bought these which have 3 wires, but I can’t understand how this going to work.

Would these work? I would just use the black wire on the female going to my white fog light wire, and on the male end spliced from c203 which wire would go to black and red? I don’t see how this would work.

 

[zuke]

You don't need to run to the Fog Light Switch, all the wiring for that is already done.

Check the two wires going into C203, Pins 43 and 48, If you've got the switch installed, and everything programmed right in Forscan, Those two wires should be hot, if they aren't then you've not got the right wires, or you've missed something in the programming.

The two wires you tapped into should go to the positive leads for the white fog lights, and the other side of the white lights would go to ground, whatever ground you'd like to use should work fine.

If there is only one wire for the white lights in the harness, can you go past the Y and get wires for both of them? That's what I would do.

 

[Gotchaa]

You don't need to run to the Fog Light Switch, all the wiring for that is already done.

Check the two wires going into C203, Pins 43 and 48, If you've got the switch installed, and everything programmed right in Forscan, Those two wires should be hot, if they aren't then you've not got the right wires, or you've missed something in the programming.

The two wires you tapped into should go to the positive leads for the white fog lights, and the other side of the white lights would go to ground, whatever ground you'd like to use should work fine.

If there is only one wire for the white lights in the harness, can you go past the Y and get wires for both of them? That's what I would do.

Looks like I found the factory fog light wire so I won’t need to splice in after all now I just need to create a harness to connect the mabbet, taking the wires for both white lights Dorman to factory molex.

Need to replace this female as it’s the wrong size with the factory fog female

Then make a dorman pigtail male. Then pull the white wires from the fog light dorman attach it to the female Dorman and all should work I believe

 

[zuke]

Looks like I found the factory fog light wire so I won’t need to splice in after all now I just need to create a harness to connect the mabbet, taking the wires for both white lights Dorman to factory molex.

Need to replace this female as it’s the wrong size with the factory fog female

Then make a dorman pigtail male. Then pull the white wires from the fog light dorman attach it to the female Dorman and all should work I believe

You have the proximity sensors in the bumper? Sorry guess I should have asked that earlier, yeah, if you have the proximity sensors then you have the fog wires too, and it sounds like you have a good plan that should work.

 

[Bill K]

Hi All,
Sorry if this has already been covered, but does anyone happen to know what the maximum amount of current that the OEM Fog Light circuit can drive?

I am looking to use this circuit to drive Diode Dynamics SSC2 Pro fog lights (rated at 2A each), so if anyone can confirm they have successfully done this, it would be a good as a value…

Thank you.

Just finished putting in the Diode Dynamics Sport series fog lights, and no issues with running off of the BCM...

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