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What is the small 4 pin wiring connector that is attached to the rear light wireing harness for ?

Discussion in '3rd Gen. Tacomas (2016-2023)' started by Taco1961, Jan 21, 2018.

  1. Jan 21, 2018 at 1:12 PM
    #1
    Taco1961

    #1
    Taco1961 [OP] Member

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    What is the unused wiring connector on the rear light wireing harness for? It's on the driver side above where the trailer light plug goes.
     
    Taco1961, Jan 21, 2018
    #1
  2. Jan 21, 2018 at 1:19 PM
    #2
    koditten

    #2
    koditten Well-Known Member

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    Reserected from the dead.
    Did you buy new? If no, previous owner could had a bed cap with a third brake light.
     
    koditten, Jan 21, 2018
    #2
  3. Jan 21, 2018 at 1:22 PM
    #3
    Taco1961

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    Taco1961 [OP] Member

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    Bought it new . Hoping it was for trailer light connector.
     
    Taco1961, Jan 21, 2018
    #3
  4. Jan 21, 2018 at 1:23 PM
    #4
    Taco1961

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    Taco1961 [OP] Member

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    It's definitely factory
     
    Taco1961, Jan 21, 2018
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  5. Jan 21, 2018 at 1:24 PM
    #5
    jake72

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    jake72 Well-Known Member

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    You have the 7 pin and 4 pin connection if that's what your talking about
     
    jake72, Jan 21, 2018
    #5
  6. Jan 21, 2018 at 1:26 PM
    #6
    Taco1961

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    Taco1961 [OP] Member

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    Would a picture help?
     
    Taco1961, Jan 21, 2018
    #6
  7. Jan 21, 2018 at 1:26 PM
    #7
    Mtn Mike

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    Mtn Mike Well-Known Member

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    Trucks with the tow package come with two different trailer connectors; the round 7 pin connector for trailers with brakes and hot lead, and the flat 4 pin connector for trailers with just lights. Are you looking at the 4 pin trailer connector?
     
    Mtn Mike, Jan 21, 2018
    #7
  8. Jan 21, 2018 at 1:30 PM
    #8
    Taco1961

    #8
    Taco1961 [OP] Member

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    No the gray oneIMG_20180121_152755873.jpg
     
    Taco1961, Jan 21, 2018
    #8
  9. Jan 21, 2018 at 1:39 PM
    #9
    Taco1961

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    Taco1961 [OP] Member

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    It's under the truck
     
    Taco1961, Jan 21, 2018
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  10. Jan 21, 2018 at 1:41 PM
    #10
    Pickupman2007

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    Pickupman2007 Well-Known Member

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    Pickupman2007, Jan 21, 2018
    #10
  11. Jan 21, 2018 at 1:53 PM
    #11
    Taco1961

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    Taco1961 [OP] Member

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    Thanks man
     
    Taco1961, Jan 21, 2018
    #11
  12. Jan 21, 2018 at 4:20 PM
    #12
    ICU1

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    ICU1 Well-Known Member

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    It’s for the TRD coffee maker
     
    ICU1, Jan 21, 2018
    #12
    kgilly, 3Sons, 2005 TRD Sport and 2 others like this.
  13. Jan 22, 2018 at 6:57 AM
    #13
    3Sons

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    3Sons Member

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    Man I wanted the coffee maker but my dealership was out of them. I got the TRD electric blanket though.
     
    3Sons, Jan 22, 2018
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  14. Feb 11, 2018 at 4:31 AM
    #14
    ddsrph

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    ddsrph Member

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    I have the same problem/question as Taco 1961. Please look at photo in post #8 above. I have the unused connector on my 2018 access cab truck. I want to
    add wiring for trailer lights and have purchased a kit from etrailer.
    There are no connectors behind the tail light assemblies as the directions describe. The only breaks in the truck harness are underneath like in photo. Is the connector next to the black unused connector where I T in?
    I have the
    $89 Tekonsha 118685 Tekonsha T-One® T-Connector Harness, 4-Way Flat, Compatible with Select Toyota Tacoma
    Tekonsha 118685 kit.
    Thanks
    JM
     
    ddsrph, Feb 11, 2018
    #14
  15. Feb 11, 2018 at 5:56 AM
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    Harvo

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    Harvo Hanging On !!!

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    Turn on your hazards and check the plug with a meter.
     
    Harvo, Feb 11, 2018
    #15
  16. Feb 11, 2018 at 6:05 AM
    #16
    ddsrph

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    ddsrph Member

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    Good idea, will try this morning. Also did anyone find out what the grey unused connector was for?
     
    ddsrph, Feb 11, 2018
    #16
  17. Feb 11, 2018 at 6:42 AM
    #17
    Pickupman2007

    #17
    Pickupman2007 Well-Known Member

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    The connectors behind the tail light should be directly on the bulb sockets at the end of the harness. They might look like part of the socket if you don’t look close.

    4EB88BF2-F777-4356-9BC1-8AF22134C9CF.jpg
     
    Pickupman2007, Feb 11, 2018
    #17
  18. Feb 11, 2018 at 7:12 AM
    #18
    ddsrph

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    ddsrph Member

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    Thanks that's were I was going wrong. I expected the connectors to be further down the harness.
    JM
     
    ddsrph, Feb 11, 2018
    #18

Products Discussed in

Tekonsha T-One® T-Connector Harness, 4-Way Flat, Compatible with Select Toyota Tacoma
$88.98
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