[Barroux]

Got my luxvision rear fog light in the mail today. Surprised to find out it’s only using that one LED but it’s real bright anyways! Those other reflectors that are not used for the rear fog must be used on the turn signal or brake lights version of the same housing.

I’ll compare with the hella version when it comes in (still 3-5 weeks from now though). I’ll try to make my foglight mounting setup easily swappable so I can swap the hella in there when I get it (if I actually reached a point where the diffuser is mounted by then).

Good news is the 55mm housing is a perfect fit in the euro diffuser opening, so no need for the overpriced OEM rear fog light.

Cleaned up the diffuser too. It’s got some small scratches but most will be barely noticeable once installed. Might take Friday off and bring it to my local plastic welding shop to see if they can fix the little tabs, most of which are currently broken.

Then I’ll find a way to mount the light, planning on mounting it directly to the diffuser to make it easier to center the light in the opening. It doesnt weight much anyways.

I’ll probably have some time to go back and look at the bcm again over the week-end to look at the other pins which might be providing power for the rear fog.

 

[ControlNode]

I was just thinking to ask about progress on finding a signal to control the light.

 

[Barroux]

I was just thinking to ask about progress on finding a signal to control the light.

Last 2 weeks were busy with work, funerals (on the inlaws side) and GF's sprained ankle...was on a 6 hours trip (both ways) for the last two week-ends for that! At least some parts showed up in the meantime to show some progress!

Hoping to dedicate some time this week-end to the wiring from the bcm again!

 

[Barroux]

Made some progress this week-end on fixing the broken tabs on the diffuser and mounting the light straight to the diffuser.

Picked up a 2 wire sealed connector from some Chrysler at the local scrapyard and fitted it using waterproof crimp unions and heatskrink tubes, trying to make it as stock looking on the wiring aspect too.

Made some .016” thick aluminum doublers for all the broken tabs, bonded them in place using epoxy adhesive and clamps. I hope it will still fit fine when inserted in the bumper cover but it’s pretty thin so it should be fine.

To mount the light I used a 2in abs plumbing pipe union (less than 1$) and a stainless wormgear clamp (cheap although I dont remember how much). Cut three little slits on one end to fit inside the diffuser and 3 larger slots at the other end to rest the light at the proper depth. The 3 small slits allow it to sit at the bottom of the light opening without getting rid of the 3 little tabs, which actually make contact with the light and help centering it in the opening. Light is held in place with a wormgear clamp which fits just right behind the light mounting tabs. Bonded the mount to the diffuser using epoxy adhesive. It’s just solid now! Will update the first post with more details and pictures when I’m back on a computer. This will make it much easier not having to mount the light to the cover and then adjusting it in a trial/error game putting the diffuser over it! The light is not heavy at all so it will be fine being held by the diffuser only.

Edit: the luxvision light as a small corner radius on the lense which makes it hard to decide at which depth I want to mount it. Looking back at the pictures I posted it may be protruding too much now when compared to the stock light on the euro RS. I'm curious to compare the lense edge shape to the Hella light when I get it. For now I might just shim the luxvision light further back into the diffuser a bit, but it's easily adjustable now just need to shim the 3 little light mounting tabs.

 

[Barroux]

Found a listing for a supposedly OEM light on eBay uk:

https://www.ebay.co.uk/itm/GENUINE-...EY-15K272-AB-2016-2017-2019/362588742985?hash=item546bf92549:g:GHYAAOSwUvFcj2VB

Interesting how the lense has the Hella brand on it and how the wires seem to not have been cut but rather pulled/forced out of crimped connections.

If it is indeed OEM it confirms the Hella rear fog light I found on rallylights.com is the exact same one as the OEM light (without the connector) for only 40$us which is a sweet deal compared to buying the OEM from UK! I'll most likely use the Hella one when it comes in as I prefer the way the lense looks VS the more aftermarket looking luxvision light. Unless it is not as bright then I'll probably use the brightest out of them.

 

[Barroux]

Installed the diffuser this afternoon, along with adding a hole for the rear tow hook. The little repair doublers at the mounting tabs fitted just fine. And the rear bumper heat shield fits back over the light too. Routed the wires for the light through the passenger side taillight feedthru.

The light is powered by 2 6V batteries on the attached picture (was making sure my connections were working before securing the harness and putting the bumper harware back in.

Will also post more details about those steps when I am on my computer. Planning to go back to the bcm tomorrow to check the other pins as suggested earlier. Would be nice to find the power source tomorrow and be done with this mod already!

Edit: ran all around town to fit a suitable plug for the rear tow hook hole! Ran out of time to dig in the bcm...might have to wait to later this week or next week-end. It’s next on the list though so I can’t procrastinate this anymore!

 

[phillofoc]

Something that may interest you, I took a dive into FORScan to change my TPMS threshold and extend the play time on the radio. I also looked for any rear fog setting, the only one I found was for locking out the rear fog if you're towing. Honestly, if your BCM turned on the light in the dash then it should be putting out power from the BCM to rear fog wiring somewhere.

 

[MorningZ]

.

I'm not 100% on when you want this light on, I'd assume while the other reverse lights are on. If that's the case this eTrailer part may able to solve your issue:

https://www.etrailer.com/Trailer-Wiring/Ford/Focus/2017/118674.html?vehicleid=201738034

It typically plugs in in-line with the stock tail light assemblies to provide 12v out for running/turn/brake, but for your case you could instead piggyback along the reverse wire of a taillight and the box will give you a clean 12v output to power your light.

Adding a simple SPST relay and a switch could give you further ability to turn it on anytime as well.


If you're looking to have it come on with the foglights, that would be something I have no idea on. I don't know a lot about this rear light you are adding and when it's supposed to be on, but the above was my best guess.

 

[Barroux]

Something that may interest you, I took a dive into FORScan to change my TPMS threshold and extend the play time on the radio. I also looked for any rear fog setting, the only one I found was for locking out the rear fog if you're towing. Honestly, if your BCM turned on the light in the dash then it should be putting out power from the BCM to rear fog wiring somewhere.

Thanks for looking at it in Forscan, I’m hoping it will be as easy as findinh the right pin at the bcm, I guess we’ll see soon as this is all that’s left to finish this project!

I just kept this last because my garage is small and I cant really open the passenger door completely to work under the glove box so it’s pretty tight working in there and not so much fun!

 

[Barroux]

.

I'm not 100% on when you want this light on, I'd assume while the other reverse lights are on. If that's the case this eTrailer part may able to solve your issue:

https://www.etrailer.com/Trailer-Wiring/Ford/Focus/2017/118674.html?vehicleid=201738034

It typically plugs in in-line with the stock tail light assemblies to provide 12v out for running/turn/brake, but for your case you could instead piggyback along the reverse wire of a taillight and the box will give you a clean 12v output to power your light.

Adding a simple SPST relay and a switch could give you further ability to turn it on anytime as well.


If you're looking to have it come on with the foglights, that would be something I have no idea on. I don't know a lot about this rear light you are adding and when it's supposed to be on, but the above was my best guess.

It’s actually a red light although the housing is clear. Meant to be used in bad weather/low visibility as a rear foglight. If I can make it work through the bcm it is controlled through the headlight switch (need the euro switch) and can be turned on when at least the running lights are on based on my tests so far.

Thanks for the link to the T-harness this would work too if wiring to the bcm does not work. The T-harness would make it extra easy for anyone wanting to run this as a fourth brake light which I dont intend to do though.

I was planning to run it to a switched power source at the rear fuse box using add-a-fuse and a dedicated switch if it doesnt work. I already feed the wires through the passenger taillight feedthru and all I need now is the power source (bcm or other).

Thanks!

 

[Barroux]

I’m at the dealer getting the driver seat backrest cushion replaced (damaged by failed lower back support mechanism) and the tech looked at the wiring in his computer for the rear fog while the heated pad adhesive cured. Found the same pin #10 I already tried for the rear fog. He suggested calling another dealer who has more experience with programming to the bcm and adding features such as this (they are a ford performance authorized dealer too and supposedly get all sorts of similar requests).

I have the day off so I’ll see what I can do today and give them a call next week if I cant figure it out with the info provided herein.

If they cant figure it out either I’ll run a dedicated switch and be done with it + provide all the info I can in the initial post for future reference if that can help anyone some day.

 

[Barroux]

Pulled the pins out of C2280B at pins 1, 9, 12 & 13 this afternoon which all had the rear fog mention in the wiring diagrams. None of them are switched with the rear fog button. Those seemed to be the rear position lights (the strip at the bottom of our tailights) and the rear brake lights.

Will check pins 19&20 of connector C2280E later today but I have the feeling those will be the backup lights...

Edit: checked pins 19/20 at connectors C2280E and those are for the backup lights. @ControlNode @phillofoc any other reference to rear fog anywhere else in the manuals? As suggested it seems every reference to any lights located in the tails are labeled as rear fog...

I guess next step is requesting an extended license in Forscan and having a look in there. My current license has expired since last time I used Forscan, will modify the TPMS treshold while I’m in there too.

Wire 10 from connector C2280B was what my dealer tech came up with too, could be a manner of programming the bcm to activate the rear fog, I still have the added pin 10 wire in the connector so this will be easy to check after makinh changes in Forscan.

 

[Barroux]

Used Forscan today to change the TPMS treshold and looked for any way to enable the rear fog.

Line 726-28-01 referenced in other platforms (fusion, mustang) was nowhere to be found and all the options with the slightest reference to the rear fog were locked (engineering mode required).

I might keep searching but for now I started wiring the light to a switch using an add-a-fuse at the rear fusebox. Routing the wires to the front was really easy just needed to pull the door surround seals, front dash side panel and trunk side trim to make a clean routing.

Will mount the switch on the steering column upper panel, the one which is two pieces with a vinyl piece in between. Got a spare part for 6$ at the scrapyard if I switch back to another setup for the switch someday, or if someone figures out the wiring to the bcm. Still need to finish the switch wiring tomorrow and find a fuse which is switched with ignition (probably the passenger heated seat fuse (35), was first using the rear passenger side door module fuse (7) but found out this one is not switched)!

Will clean up the first post with all the info I have when I’m done.

 

[ProfessorFate]

Still need to finish the switch wiring tomorrow and find a fuse which is switched with ignition (probably the passenger heated seat fuse (35), was first using the rear passenger side door module fuse (7) but found out this one is not switched)!

Use F87, the heated steering wheel.

 

[Barroux]

Use F87, the heated steering wheel.

Thanks for the tip! Already using that one for the Escape auto-dimming rear view mirror. Plus I’m hoping to tap in the trunk area fuse box since I have all the wiring going straigth to the driver side up front from the trunk area.

My manual does not show those fuses being used (not even in the RS supplement) but fuses 34 and 35 from the aft fuse box should be for driver and passenger side heated seats. I’m guessing those are switches just like the heated steering fuse was. Will verify that tomorrow and get the switch mounted, just got back from a concert and actually convincing myself not to go finish it right now and do it when I get some rest instead! Supposed to get the pushbutton switch and pigtail connector I ordered on amazon tomorrow anyway.

Edit: Mounted the add-fuse at Fuse F35 this morning and it is switched on/off with ignition. You can ear the relay click when power shuts down a few seconds after you turn the ignition off. Now waiting for the switch to show up it’s on the delivery truck at the moment. For those wanting to wire this to the passenger footwell fuse box F87 as suggested in previous post is also a good fuse to use for this purpose.

https://www.amazon.ca/dp/B01N5AXH0K/ref=pe_3034960_233709270_TE_item

https://www.amazon.ca/dp/B01H5BMXKG/ref=pe_3034960_236394800_TE_dp_2

 

[RSt~n~peace]

I have the auto trunk. I can use the key fine......

I actually prefer not having the trunk button to where it is since when you press while driving.... in my case, it will open wide on the road.

Ford issued a PCM update to prevent opening while in motion.

 

[nicklulu]

I guess I nee to visit my dealer one of these days.

I tested driving at low speed and it does open.

I guess till the doors does not lock when i motion it'll still open.

 

[Barroux]

I guess I nee to visit my dealer one of these days.

I tested driving at low speed and it does open.

I guess till the doors does not lock when i motion it'll still open.

Good info, I never tried it, i guess I’ll try when I put the stock light switch back in!

Rear fog is all wired, pretty pleased with the end result, the switch is pretty stealth and only projects a little bit of blue light on the cluster surround piece when turned on to indicate the rear fog is on (cant see the switch from the driver’s seat where it is located). The rear fog light is quite bright and projects a nice beam of light. It will function perfectly in bad weather and reduced visibility conditions and as intended.

Will update the first post with all the info and pictures I have when I’m on my computer.

Also changed the bulb in the glovebox while putting it back in. I didnt even know there was a light in there until I took it apart and noticed it was burned. Used some LED so it hopefully lasts forever now! Although a traditional bulb would emit more side light and in this case it’s probably what you want since the housing has the opening on the side of the bulb to light up the glovebox. It is bright enough to compensate though!

 

[jefferysanders]

Sorry for the late entry...

Did you change rear foglight function BCM setting from 03 to 02

and rear foglight tow function from 01 to 02
(not sure if the tow setting like this is essential, but it's set on all cars I've seen with my ASbuilt database) These are surely the correct EU BCM settings.

Did you retest your added pin 10 after this bcm change and full car system restart? That rear fog button on the euro switch should now have the ability to toggle the power?

To Recap what I also confirmed elsewhere,
ControlNode was very likely correct with:

[BCM]>C2280B-10>----CLS45(RD-BK)---->C431-9>----CLS45(RD-BK)----<C699-1<[FOG LAMP, CENTER REAR]>C699-2>----GD150(BK-WH)----<C431-10<----GD150(BK-WH)----(S402)----G401.

The rear connector 431 is missing wire CLS45(RD-BK) & (BK-WH to GD150 near rear fuses), CLS45 would lead from (correct part number for EU rear bumper harness, ty Terry = G1ET-15K868-RAD) through C431 to BCM2280(B) , our incorrect harness (usdm harness) is missing wires like stated above. That being said, it was pin 10 and likely wired correctly...and if you didn't change the setting in Forscan...that's 100% very likely all the issue ever was with it not switching power...but if you did...well it's still wiring and I'll get that worked out within the weekend.

 

[Barroux]

Sorry for the late entry

Did you change rear foglight function BCM setting from 03 to 02

and rear foglight tow function from 01 to 02
(not sure if the tow setting like this is essential, but its set on all cars I've seen with my ASbuilt database) These are surely the correct EU BCM settings.

.

No worries!! Thanks for jumping in to help! I did not change the settings above as I did not know how to access the engineering mode (could not change setting actually).

Can you let me know how to access the engineering mode? I’ll give it a try over the week-end and go back to the bcm to check if pin 10 power is switched with the press of the rear fog button (left the added pin in there for further trials).

If this gets the pin 10 power switching I’d be happy to simply have to run a wire to the back! I have it wired to a switch for now (powered by rear fuse box add-a-fuse) which works perfectly in the meantime.

Thanks!