Geofferstang
Member
- Joined
- Sep 20, 2022
- Threads
- 1
- Messages
- 18
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- 57
- Location
- Surrey, United Kingdom
- First Name
- Geoff
- Vehicle(s)
- Mustang Mach1 FJG
- Thread starter
- #1
Following on from my post in “What did you do to your Mach 1 today” I thought that I would do a standalone post for my fog light installation. It’s not a comprehensive walkthrough but I wanted to bring together what I have learnt recently around installing fogs to the Mach 1. This is based on a 2022 UK spec / RHD so other markets may vary. As ever, make sure you follow local regs / understand what you are doing / be careful - I am not responsible for what you do.
Key parameters for me were: -
Firstly, a couple of pictures of the finished item.
And dashboard showing indicators for lights, front fog and rear fog.
The fogs I used are these: -
Linked: -
Amazon Link to fogs
(Mods, no affiliation on this but remove if I have overstepped).
They can show White or Amber and as these are fogs, I have them mounted upside down so that the area with three straight LEDs lines up with the flat spot on the top of the grille aperture. These are not high power (consume about 0.56 amp per lamp per colour) so happy to wire to the BCM with a DPDT switch to either output white or amber.
These are mounted in rings that I designed and printed in ABS.
These can be freely downloaded here: -
Thingiverse link
Positive cables from the fog lights are lead back too the footwell (where the BCM is) and the grounds are shared at an appropriate ground point in the engine bay.
Parts needed
How it works.
NOTE BEFORE DOING ANY ELECTRICAL WORK, DISCONNECT THE BATTERY....
In the S550 Mustang, the fog light switch provides a momentary 3.3V or 3.5V signal to the BCM to toggle the fog lights. It’s not latching at the switch so looking to use the front fog wire from the switch via a TTL level relay starts to get complicated.
This signal is sent through the Grey wire from pin 14 on the light switch to pin 20 on plug C2280B on the BCM. As the Grey wire is present in the Mach 1 it’s just a simple case of removing the lower trim panel: -
Then the bolt / upper trim panel with the light switch in and then swapping the light switches (my new one in place above). Your new light switch can now send a front fog signal to the BCM!
However, the cables from the BCM to the front fogs that exist in the GT are missing from the Mach 1 so we need to add these in (the pins in the socket on the BCM are present so its cabling that that needs sorting).
The front fog BCM 12V output is presented at socket J7 on the bottom of the BCM that plug C2280G plugs into.
Luckily this is the plug at the very bottom of the BCM, nearest to the firewall – so the easiest to access (which is great if you have a RHD mustang as it gets crowded down there with the pedals!). Probably easier on a LHD model...
IMPORTANT NOTE – Disconnect the battery before playing around with the BCM. As well as Fog lights the plug also carries CANBUS signals!
To get access to this power you need to insert the two pigtails into pin sockets 12 (left fog) and 5 (right fog) into the plug CC2280G.
Remove the plug from the BCM.
Unclip and remove the red alignment guide.
With the white latch upright, unclip the back of the plug and move out of the way.
Insert the two pigtails form the back in positions 12 and 5 and put the plug back together (assembly is reverse of disassembly). Plug back into the BCM.
There is a video here of re-pining the plug that also helps understand what's going on here (from 4:04 onwards): -
YouTube link
Once programmed these will give you 12V for front left and front right fogs on the appropriate pigtails. I am not sure of the maximum current the BCM can output for the fogs (I guess around 1- 1.5 amps?) so if you are installing some high wattage lights then you can probably use these to power a relay as appropriate.
Programming
Once the wiring has been completed and you are happy that there are no shorts and that the connectors / crimps etc. are tight then its on to the programming. I’ll not cover details of Forscan as there a number of tutorials for this out there.
You will need a laptop, OBDII cable and a registered copy of Forscan (https://forscan.org/)
IMPORTANT
Reconnect the battery - Make sure your battery is fully charged in the car and the laptop (probably best to plug both into a charger whilst doing this). Writing data to a module when your car is at low voltage can risk damage / bricking the module!
Only write one parameter change at a time, even within the same module!
It's not difficult if you are methodical but readup / watch videos on this as mistakes can be expensive.
Connect your car to Forscan. You’ll need to make the following changes: -
Select and "play" the IPC (Instrument Panel Cluster) and update the "Front fog lamps" parameter to "Enabled" – this will enable the display.
Once that is done and written "stop" the IPC module
Select and "play" the BdyCM (Body Control Module)
Filter on fog
Write the following: -
Front fog lamps – update to Enable
Right Front Fog Lamp Usage – set to Fog Only
Left Front Fog Lamp Usage - set to Fog Only
Note, you can probably tweak other options for the Left and right front fogs however you need to ensure that "Front fog lamps" is Enabled and Left and Right are not set to “Not Used” to get 12V from the BCM pigtails.
Once done and written, "stop" the BCM connection and disconnect Forscan from the car remove the OBDII cables etc...
Hope this helps someone on the journey to filling those blanking plates, let me know if this is useful at all....
Key parameters for me were: -
- Make it look OEM if possible.
- Get some round fog lights in the grille aperture.
- Make it reversable as much as possible so I could revert to stock if needed.
Firstly, a couple of pictures of the finished item.
And dashboard showing indicators for lights, front fog and rear fog.
The fogs I used are these: -
Linked: -
Amazon Link to fogs
(Mods, no affiliation on this but remove if I have overstepped).
They can show White or Amber and as these are fogs, I have them mounted upside down so that the area with three straight LEDs lines up with the flat spot on the top of the grille aperture. These are not high power (consume about 0.56 amp per lamp per colour) so happy to wire to the BCM with a DPDT switch to either output white or amber.
These are mounted in rings that I designed and printed in ABS.
These can be freely downloaded here: -
Thingiverse link
Positive cables from the fog lights are lead back too the footwell (where the BCM is) and the grounds are shared at an appropriate ground point in the engine bay.
Parts needed
- Fog lights (of course!) and appropriate wiring extensions / connectors etc.
- 2018+ GT headlight switch with front + rear fog light switches (DG9T-13D061-FE3JA6)
- 2 x BCM pigtail cables (BU5T-14474-UA). This cable can be found in Ford Kit Part number = DU2Z-14474-DA (this is what I ordered from my Ford parts dealer at £5.95 each). I believe that this is also in Motorcraft = WT-1003 / Ford Terminal PN = 7U5T-14474-UA. It is a 1.5mm2 silver connector. NOTE you will need 2 connectors and on ebay they are often shown as a pack of 5, however CHECK with the vendor as it’s often the case that these are individual cables.
- Forscan on a laptop
- Appropriate OBD11 cable
How it works.
NOTE BEFORE DOING ANY ELECTRICAL WORK, DISCONNECT THE BATTERY....
In the S550 Mustang, the fog light switch provides a momentary 3.3V or 3.5V signal to the BCM to toggle the fog lights. It’s not latching at the switch so looking to use the front fog wire from the switch via a TTL level relay starts to get complicated.
This signal is sent through the Grey wire from pin 14 on the light switch to pin 20 on plug C2280B on the BCM. As the Grey wire is present in the Mach 1 it’s just a simple case of removing the lower trim panel: -
Then the bolt / upper trim panel with the light switch in and then swapping the light switches (my new one in place above). Your new light switch can now send a front fog signal to the BCM!
However, the cables from the BCM to the front fogs that exist in the GT are missing from the Mach 1 so we need to add these in (the pins in the socket on the BCM are present so its cabling that that needs sorting).
The front fog BCM 12V output is presented at socket J7 on the bottom of the BCM that plug C2280G plugs into.
Luckily this is the plug at the very bottom of the BCM, nearest to the firewall – so the easiest to access (which is great if you have a RHD mustang as it gets crowded down there with the pedals!). Probably easier on a LHD model...
IMPORTANT NOTE – Disconnect the battery before playing around with the BCM. As well as Fog lights the plug also carries CANBUS signals!
To get access to this power you need to insert the two pigtails into pin sockets 12 (left fog) and 5 (right fog) into the plug CC2280G.
Remove the plug from the BCM.
Unclip and remove the red alignment guide.
With the white latch upright, unclip the back of the plug and move out of the way.
Insert the two pigtails form the back in positions 12 and 5 and put the plug back together (assembly is reverse of disassembly). Plug back into the BCM.
There is a video here of re-pining the plug that also helps understand what's going on here (from 4:04 onwards): -
YouTube link
Once programmed these will give you 12V for front left and front right fogs on the appropriate pigtails. I am not sure of the maximum current the BCM can output for the fogs (I guess around 1- 1.5 amps?) so if you are installing some high wattage lights then you can probably use these to power a relay as appropriate.
Programming
Once the wiring has been completed and you are happy that there are no shorts and that the connectors / crimps etc. are tight then its on to the programming. I’ll not cover details of Forscan as there a number of tutorials for this out there.
You will need a laptop, OBDII cable and a registered copy of Forscan (https://forscan.org/)
IMPORTANT
Reconnect the battery - Make sure your battery is fully charged in the car and the laptop (probably best to plug both into a charger whilst doing this). Writing data to a module when your car is at low voltage can risk damage / bricking the module!
Only write one parameter change at a time, even within the same module!
It's not difficult if you are methodical but readup / watch videos on this as mistakes can be expensive.
Connect your car to Forscan. You’ll need to make the following changes: -
Select and "play" the IPC (Instrument Panel Cluster) and update the "Front fog lamps" parameter to "Enabled" – this will enable the display.
Once that is done and written "stop" the IPC module
Select and "play" the BdyCM (Body Control Module)
Filter on fog
Write the following: -
Front fog lamps – update to Enable
Right Front Fog Lamp Usage – set to Fog Only
Left Front Fog Lamp Usage - set to Fog Only
Note, you can probably tweak other options for the Left and right front fogs however you need to ensure that "Front fog lamps" is Enabled and Left and Right are not set to “Not Used” to get 12V from the BCM pigtails.
Once done and written, "stop" the BCM connection and disconnect Forscan from the car remove the OBDII cables etc...
Hope this helps someone on the journey to filling those blanking plates, let me know if this is useful at all....
Sponsored
for the detailed post of this project. 
).
