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Euro Rear Fog Light Installation

This is a discussion on Euro Rear Fog Light Installation within the Focus RS Lighting forums, part of the Focus RS Garage category; 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 ...

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Thread: Euro Rear Fog Light Installation

  1. #51
    Supporting Member Barroux's Avatar
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    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.
    Last edited by Barroux; 03-29-2019 at 07:13 AM.

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    Supporting Member Barroux's Avatar
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    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.
    Last edited by Barroux; 03-29-2019 at 06:46 PM.
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    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.
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  5. #54
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    Quote Originally Posted by Barroux View Post
    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.
    Previous: 2013 Focus ST, Tuxedo Black (traded in)
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    Supporting Member Barroux's Avatar
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    Quote Originally Posted by ProfessorFate View Post

    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/...709270_TE_item

    https://www.amazon.ca/dp/B01H5BMXKG/...394800_TE_dp_2
    Last edited by Barroux; 03-31-2019 at 06:56 AM.
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    Quote Originally Posted by nicklulu View Post
    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.
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  8. #57
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    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.
    2018 NB Focus RS LE
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  9. #58
    Supporting Member Barroux's Avatar
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    Quote Originally Posted by nicklulu View Post
    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!
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    Sorry for the late entry...Name:  325884d1553987114-euro-rear-fog-light-installation-0b4af88d-4d61-4629-a27a-3076fdeb149f_1553987.jpeg
Views: 59
Size:  2.14 MB Did you change rear foglight function BCM setting from 03 to 02 Name:  325886d1553987153-euro-rear-fog-light-installation-c2554669-9dff-49ea-bc34-8b164fc09476_1553987.jpeg
Views: 56
Size:  2.53 MB 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.
    Last edited by jefferysanders; 04-04-2019 at 12:39 PM.
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  11. #60
    Supporting Member Barroux's Avatar
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    Quote Originally Posted by jefferysanders View Post
    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!

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