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Gen 4 Taillight Connector and Pin Part Numbers
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Thread: Gen 4 Taillight Connector and Pin Part Numbers

  1. #1

    Join Date
    Jul 2018
    Thanked 12 Times in 5 Posts

    Cool Gen 4 Taillight Connector and Pin Part Numbers

    First post here, going to make it a good one.

    I've searched high and low for part numbers on what is required to make the harness to swap in Gen 4 taillights on North American cars and I came up empty handed.

    I've sourced out the connectors and pins needed for the swap. I sourced all my parts from Mouser Electronics and it would cost less than $30 in parts before taxes and shipping.

    My Gen 4 lights are the regular filament lights and I required no special load resistors or flasher relays to do the swap.


    All parts are made by Tyco Electronics

    1456426-1 is the connector to mate to the Gen 4 taillight. The "-1" is important as that specifies the location of the key or slot for the connector. (QTY 2)

    1418850-3 is the pins (QTY 8, more in case you mess up)

    If you want to make it plug and play and not cut up the factory harness you need these also:

    282107-1 is the mating connector to the factory taillight connector (QTY 2)

    282109-1 is the pins (QTY 10, again more just in case you mess up your crimps)

    PINOUTS FOR THE CONNECTORS (This is on my 500e - not sure if it is the same as the gas)

    OEM harness

    Left and Right taillight are different.


    Pin 1 - DK BLU/WHT - Turn
    Pin 2 - GRY/DK GRN - Backup
    Pin 3 - BLK - Ground
    Pin 4 - DK GRN/WHT - Stop
    Pin 5 - YEL/RED - Park


    Pin 1 - YEL/RED - Park
    Pin 2 - DK GRN/WHT - Stop
    Pin 3 - BLK - Ground
    Pin 4 - GRY/DK GRN - Backup
    Pin 5 - DK BLU/WHT - Turn

    GEN 4 Taillight

    Left and Right are different also because of the bulb output for the different wattage filaments. You will get dash warning lights if you don't wire it right)


    Pin 1 - Park
    Pin 2 - Stop
    Pin 3 - Ground
    Pin 4 - Turn


    Pin 1 - Stop
    Pin 2 - Park
    Pin 3 - Ground
    Pin 4 - Turn

    I had the water seals necessary at my work and being as it is what I do for a living I had the multitude of crimpers required to do the job right.
    Last edited by Beav; 08-16-2018 at 06:29 PM. Reason: Added manufacturer

  2. The Following 4 Users Say Thank You to Beav For This Useful Post:

    Abarth_X (09-08-2019), ronto (11-02-2018), SSGForti (12-17-2018), Wimbledon (07-14-2019)

  3. #2
    Robert Nixon's Avatar
    Join Date
    Aug 2012
    Great Neck, NY
    Thanked 1,683 Times in 1,165 Posts
    Hey welcome to the forum and thanks for the write up on this conversion. Hopefully that will help out some other folks!
    2013 Rosso Abarth with 68K miles, Koni yellow shocks, Madness springs, Neu-f rear sway bar, EBC Yellowstuff brake pads, DOT4 brake fluid, K&N air filter, autocross 17 inch Ciao Milano wheels with Bridgestone Potenza RE71R, daily wheels stock 16 inch Dunlop DZ102. 2017 1st place HS Tidewater Sports Car Club: 2016-2015 1st Place TSCC GS class; 2014-2013: 2nd place in SCCA South Carolina Region G Stock.
    My Car blog:

  4. #3

    Join Date
    Jul 2018
    Thanked 12 Times in 5 Posts
    My completed harness (extra connector is to my reverse lights)

    And the car

  5. The Following 2 Users Say Thank You to Beav For This Useful Post:

    RostHaus (05-07-2019), SSGForti (12-17-2018)

  6. #4
    Junior Member
    Join Date
    Nov 2018
    Thanked 10 Times in 8 Posts
    Thanks for this.

    I was really not looking forward to paying $200+ for a simple harness.

    I plan on making 2 sets, one with and one without [COLOR=#333333]resistors; as I haven't had any canbus ready LED bulb I've put in the 500e need in-wire resistors.[/COLOR]
    2015 Fiat 500e
    LED Headlamps, Reverse, Interior.

    2016 Bmw i3 Rex - H&R springs
    2002 Audi Allroad ASP Stage 3
    2000 Audi S4 ASP Stage 3+

  7. #5
    Join Date
    May 2012
    Thanked 5 Times in 5 Posts
    @Beav Thank you for this write up.

    Would anyone with the requisite skills like to start making these harnesses for the community, giving us more options? I'd buy one. I'd like to do this mod, but I don't want to pay $200 for this harness...

  8. #6
    Junior Member
    Join Date
    Mar 2020
    Thanked 1 Time in 1 Post
    @Beav Seriously thank you. I’ve seen a hand full of tail light conversion videos on TY, but they were all presented poorly. Your write up is 10X more effective! You should really sell these!!

  9. #7
    Junior Member
    Join Date
    Jan 2020
    Thanked 2 Times in 2 Posts
    How do I identify Pin-1? Your insight is highly appreciated.

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