Here is the procedure for retrofitting Euro/ROW driving/fog lights and rear fog lights to a US market car. I did this on my '86 944T. This will apply to '85/2 – ’91 cars, including S2. Please take the usual precautions - disconnect battery negative cable, don’t electrocute yourself, etc. Naturally, I'm not responsible for anything detailed below and you attempt it at your own risk.
Parts Required:
944-610-183-02 – Quantity 1 - Bridge Adapter Rear Fog Light Auxiliary Fog Light
944-612-537-00 – Quantity 1 – 6 Pole Connector – Rear Fog Light Switch
999-652-376-12 – Quantity 5 – Terminal for 6 Pole Connector
944-613-120-04 – Quantity 1 – Rear Fog Light Switch
999-652-451-22 – Quantity 3 – CEB Terminal (possibly NLA. Order TE 925612-1 or TE 925965-1 instead)
Option A
477-945-113 – Quantity 1 – Euro Taillight Panel - Left
477-945-114 – Quantity 1 – Euro Taillight Panel – Right
Option B
PCG-945-114 – Quantity 2 – Lamp Socket
N-017-242-1 – Quantity 2 – Flat Spade Terminal
N-017-564-1 – Quantity 2 – Taillight Terminal (Taillight Harness Side)
N-017-562-4 – Quantity 2 – Taillight Terminal (Body Harness Side)
Euro Fog Light Conversion
951-631-211-00 – Quantity 1 – Fog Light Assembly Left
951-631-212-00 – Quantity 1 – Fog Light Assembly Right
SURESEAL Part Numbers
120-1809-000 – Quantity 2 – 4 Pin Plug
120-1806-000 – Quantity 2 – 4 Pin Receptacle
317-1397-000 – Quantity 2 – Boot (Not required but good to replace)
030-2196-001 – Quantity 2 – Male Terminal
031-1267-001 – Quantity 2 – Female Terminal
070306-0000 – Insertion Tool (Sureseal)
DAK16B M81969/17-04 REV.B – Insertion Tool (JR Ready)
DRK16B M81969/19-01 REB.B – Removal Tool (JR Ready)
Wire - Use high qualify wire like M22759/16 Standard Wall ETFE Tefzel Wire and not janky Autozone garbage. You want this to last.
Wire – 20 feet – 18AWG Gray/White (Switch to Rear Fog Light)
Wire – 3 feet – 18AWG Gray/White (CEB to Switch)
Wire – 20 feet – 16AWG White/Yellow (Left driving light)
Wire – 20 feet – 16AWG White/Green (Right driving light)
Rear Fog Light Procedure
1. Unclip and remove the central electric panel cover.
2. Unplug and remove the G6 bridge adapter (it looks like a really short relay, only about 1/2 inch tall). The part number stamped on mine is 944.610.183.06. Replace with G6 bridge adapter 944.610.183.02.
3. Unscrew Central Electric Board mounting posts
4. Pull up on Central Electric Board to reveal the connectors going to it. Slide the Central Electric Board retaining clip forward to unlock all of the connectors on the bottom side of the Central Electric Board. We will be modifying Block “J”. The blocks are installed in alphabetic order and there is a large “J” molded into the Central Electric Board. Locate the “J” block and remove it.
5. With Block “J” removed from the Central Electric Board, take note that there are four (4) connectors sandwiched together to make one large block. We will be adding one (1) wire to this block. Separate the “J” block connectors and install a wire (Gray; 16AWG/1.0mm2; 36” length; Central Electric Board side Terminal 999-652-451-22; Switch side Terminal N-903-353-03) from J11 to the Rear Fog Light switch connector (944-612-537-00). The connector block closest to the colored “coding” connector contains terminals J11-J15. The next block contains J21-25. The following block contains J31-35. They are numbered from left to right. Run the wire along the existing loom from the Central Electric Board.
6. Install the wire from J11 to Pin 6 of the Rear Fog Light connector. Note the terminal configuration of the 6 pin connector, it is 6-4, 2-1, 5-3 for the pins.
Pin Assignment of Rear Fog Light Connector
1. Ground to MP III (Inside Firewall Ground near Central Electric Board)
2. Output to Rear Fog Light – Driver Side
3. Power in for ambient dash lighting; Bridge from Fog Light Switch Pin 3
4. Power in for bright "on" light inside switch, Bridge from Fog Light Switch Pin 2
5. Not used
6. Power in for Switch “on” from CEB J11
7. From the Rear Fog Light connector, install a wire (Gray/White; 18 AWG/1.0mm2; Fog Light Side 999-652-376-12/Tail Light Side N-017-564-1) from Pin 2 of the Rear Fog Light connector to Pin 5 of the driver side Tail Light Connector. At the same time, install a second wire (Gray/White; 18 AWG/1.0mm2) from Pin 5 of the driver side Tail Light Connector to Pin 5 of the passenger side Tail Light Connector. This will require crimping two wires into a single terminal on the driver side connector or using a step-down splice to separate the wires to both taillights. I opted for the step down splice for ease of install.
8. Now it’s time to prepare the rear tail light housings. If using Option A, above, simply remove the US taillight panel, unplug, and install the Euro taillight panels with new bulbs and reconnect the harnesses. If using Option B, then the existing taillight panels will be modified to accept an extra bulb holder and we will move the wiring on the panel to match the Euro taillight configuration. First install the new bulb holders (PCG-945-114) on each taillight panel. Then, add the wire (Gray; 18 AWG/1.0mm2; N-017-564-1; 6.3mm spade connector) from the taillight connector to the new bulb holder. This will illuminate the previously empty lens next to the brake light. If you desire to perfectly match the Euro light configuration, unplug the wires and re-assign them in this configuration:
US brake = Euro fog
US driving = Euro brake
US center blank = Euro driving
US blinker = Euro blinker
US reverse = Euro reverse
9. Reinstall the taillight housings and test function. The Rear Fog Light Switch should illuminate when the front fog lights are illuminated and should not illuminate when the front fog lights are inactive. This exactly matches the original Euro rear fog light configuration.
Euro Driving Light Conversion
*Note* There are multiple ways to install and configure Euro driving lights with multiple write-ups depending on how the driver wants the lights to function. I desired them to function in the same manner as the European market cars. Driving lights come on with high beams, and “flash to pass” with the headlights off. I did not want a separate switch. The below instructions will explain how to achieve this configuration.
1. Disconnect battery.
2. Remove the front bumper.
3. The above G6 “Bridge Adapter” relay must be used (944-610-183-02). Remove the US G6 adapter (944-610-183-06) and replace with ROW G6 Bridge Adapter.
4. Unscrew Central Electric Board mounting posts
5. Pull up on Central Electric Board to reveal the connectors going to it. Slide the Central Electric Board retaining clip forward to unlock all of the connectors on the bottom side of the Central Electric Board. We will be modifying Block “C”. The blocks are installed in alphabetic order and there is a large “C” molded into the Central Electric Board. Locate the “C” block and remove it.
6. With Block “C” removed from the Central Electric Board, take note that there are four (4) connectors sandwiched together to make one large block. We will be adding two (2) wires to this block. Separate the “C” block connectors and install a wire (White/Yellow; 16AWG/1.5mm2; Central Electric Board side Terminal 999-652-451-22; Driving Light side Male Sureseal Terminal 030-2196-001) from C21 to the Driver Side Driving/Fog Light connector (120-1806-000). Then, install a wire (White/Green; 16AWG/1.5mm2; Central Electric Board side Terminal 999-652-451-22; Driving Light side Male Sureseal Terminal 030-2196-001) from C31 to the Passenger Side Driving/Fog Light connector (120-1806-000). The connector block closest to the colored “coding” connector contains terminals C11-C15. The next block contains C21-25. The following block contains C31-35. They are numbered from left to right. Run the wire through the Engine Bay Harness grommet in front of the Central Electric Board along the existing loom down to the bumper area.
7. Using a fish tape, stiff wire, or a modified hanger, affix the 16AWG White/Yellow and White/Green wires and push them through the firewall connector the Central Electric Board uses to enter the engine bay. Use of heat shrink for physical protection is recommended but not necessary. I found it was easiest to crimp the wires to a thin metal rod (welding rod or a hanger would work), leave approximately 12” of length, then cover 6 feet using ½” 2:1 DR-25 heat shrink. Run the wires together along the engine bay harness on the driver side. The Left side (White/Yellow) will terminate where the current fog light harness plugs into the engine bay harness. The Right side will continue along the front of the car with the engine bay harness until reaching the Right side (White/Green) fog light harness. I used ¼” 2:1 heat shrink to protect the single White/Green wire. I used ATUM 3:1 adhesive heat shrink to environmentally seal the wiring at the Central Electric Board, where the wires split down to ¼”, and at the end of both wires at the fog light connectors.
8. Remove the pins from the current 2 pin SureSeal connector on the engine bay wiring harness. This will be replaced with a 4 pin SureSeal connector to match the ROW wiring harness for the combined driving/fog light assembly.
9. Plug in new SureSeal connector to the ROW driving/fog light harness. The body-side harness will require modification to match the ROW harness on the lights. The fog light terminal must be switched from male to female. The new wire for the driving light will be a male terminal. Only cut as little of the existing fog light wire as necessary to remove the original terminal. To perfectly match the ROW light configuration, adding the parking light requires splicing into the turn signal harness, or removing the terminal for parking light and moving it to the fog/driving light harness. I opted to not perform this step because I found it unnecessary. If you opt to repurpose the parking lights from the turn signals, the wire assignments are in paratheses below.
9a. Light unit
Terminal 1: Black – Fog Light - Female
Terminal 2: Brown – Ground – Female
Terminal 3: Red – Parking Light - Male
Terminal 4: White – Driving Light – Male
9b. Body side – Driver Side
Terminal 1: White/Red – Fog Light - Female
Terminal 2: Brown – Ground – Female
Terminal 3: Not Present (Black/White – Parking Light – Male)
Terminal 4: White/Green – Driving Light – Male
9c. Body side – Passenger Side
Terminal 1: White/Yellow – Fog Light - Female
Terminal 2: Brown – Ground – Female
Terminal 3: Not Present (Black/Green – Parking Light – Male)
Terminal 4: White/Yellow – Driving Light – Male
10. Reinstall front bumper.
11. Reconnect battery.
12. Test lights. The driving lights should come on when the main beams (high beams) are on and should also come on when the main beams are temporarily engaged (flash to pass). The fog lights should turn off whenever the driving lights are on.
