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7 Pin Trailer Connector Kit?

Discussion in '2nd Gen. Tacomas (2005-2015)' started by KactusJack, Dec 10, 2017.

  1. Dec 10, 2017 at 4:28 PM
    #1
    KactusJack

    KactusJack [OP] Well-Known Member

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    Hello all. I recently purchased a 2014 Tacoma AC, TRD Sport, 4x4, V6, and AT (my first truck ever). Been reading a lot on Tacoma World, and now experiencing "info and ideas overload." I'm sure I'll have a lot of questions, but right now working on something I've not found an answer to yet.

    The truck has the factory Tow Package, but they also Port installed option "4P 7 Pin to 4 Pin Adapter," and it has no 7 pin trailer connector, just a 4 pin. Anyone know of a 7 pin connector and wiring harness that will simply plug into the existing wiring connectors (under the back of the truck) and provide both trailer connectors?

    I found this one on Amazon, but it appears to be for a Tundra; didn't find one for Tacoma. Was wondering whether the Tacoma uses the same wiring harnesses.

    https://www.amazon.com/dp/B004BE7WN4/_encoding=UTF8?coliid=I32KYDKXDR8DTX&colid=X4B0CMZI4Y6N&psc=0

    Thanks for any assistance.
     
  2. Dec 10, 2017 at 9:12 PM
    #2
    Bebop

    Bebop Old fashion cowboy

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    6inch lift sitting on bilstein coilovers. Lexus is300 studs in front to keep stock wheels, general grabber red letters, nfab front bumper.
    I bought a 7 pin to 4 pin adaptor at tractor supply years ago and it still works fine
     
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  3. Dec 11, 2017 at 12:08 PM
    #3
    Sold My Subaru

    Sold My Subaru 6MT AC TRD OR 1GR-FE FTMFW

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    Are you sure you have the factory tow package? I've NEVER heard of a 4-pin trailer connection coming as an OEM option from Toyota on any 2'nd gen Tacomas.
     
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  4. Dec 11, 2017 at 1:01 PM
    #4
    KactusJack

    KactusJack [OP] Well-Known Member

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    Well, I requested the Vehicle Specifications from Toyota, supplying my VIN. It shows Factory installed "TO V6 Tow Package" along with the above mentioned Port installed "4P 7 Pin to 4 Pin Adapter." The truck has trans and oil coolers, and heavy-duty alternator. I'm looking to have BOTH connectors.
     
  5. Dec 12, 2017 at 3:57 PM
    #5
    Sold My Subaru

    Sold My Subaru 6MT AC TRD OR 1GR-FE FTMFW

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    Got it.

    Toyota shows an OEM 4-pin to 7-pin $15 option for the Land Cruiser. This could be a pretty clean looking solution.
    With some digging you should be able to get the part number.
    [​IMG]
     
    Itsme_Bernie likes this.
  6. Dec 12, 2017 at 4:42 PM
    #6
    iLLogics

    iLLogics Well-Known Member

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    If you can, post a picture of your rear bumper and hitch setup. Leave your license plate out of the pic for safety reasons. (A rag or paper works great) I'm thinking you might have a 7 too 4 adapter plugged into your 7 pin.
     
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  7. Dec 13, 2017 at 12:16 PM
    #7
    KactusJack

    KactusJack [OP] Well-Known Member

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    Here's a couple pics. The first one shows the hitch. A little to the left of the hitch is a bracket with 2 bolts, I believe that's a mount point for a 7-pin connector bracket. A little further left of that is the 4-pin connector; it's wire tied to the frame.

    This pic is looking straight up under the back of the truck. The multi-colored wire bundle runs to the 4-pin connector. The other end goes to a "black box" which I would think is an adapter to combine separate signal and brake lights to single lights on a trailer.
    The connector near the bottom is a 7-pin (maybe more; hard to see) with nothing plugged into it.
    There are two pairs of wires running from the black box to the tail light assemblies. This makes me think the 4-pin connector harness is some after-market piece, rather than a factory set, making this setup even more mysterious.
    There is no 7-pin connector anywhere to be found.

    (Sorry, posting this pic made it rotate 90 degrees clockwise.)
     
  8. Dec 13, 2017 at 12:22 PM
    #8
    DaveInDenver

    DaveInDenver Not Actually in Denver

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    That's not Toyota wiring. Looks like a generic adapter maybe from U-Haul.
     
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  9. Dec 13, 2017 at 12:25 PM
    #9
    DaveInDenver

    DaveInDenver Not Actually in Denver

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  10. Dec 13, 2017 at 12:32 PM
    #10
    Jake91

    Jake91 Well-Known Member

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    i got a generic one from auto zone, cut a hole through the steel bumper and plugged it in. It had both the 4 pin and the 7 pin. worked like a charm. and I didnt have to add any more wires. everything plugged right into what was already there
     
  11. Dec 13, 2017 at 12:32 PM
    #11
    robupstateny

    robupstateny Well-Known Member

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    i'd check with @gunny1005 on this. Might be a better price thru him.
     
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  12. Dec 13, 2017 at 12:33 PM
    #12
    KactusJack

    KactusJack [OP] Well-Known Member

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    Yeah, that's what I'm thinking, too. So I don't really know what the port-installed 7-pin to 4-pin adapter was for, unless it was later replaced with this harness.

    So do I have any chance of finding a kit that will easily plug in and provide both connectors? There's an RV dealer nearby that installs hitches and connectors, but I'd bet they'd be pretty expensive; like to avoid that.
     
  13. Dec 13, 2017 at 12:34 PM
    #13
    DaveInDenver

    DaveInDenver Not Actually in Denver

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    I have the factory harness and I just plug this into it when I need a 4 pin.

    $_3.jpg
     
  14. Dec 13, 2017 at 12:41 PM
    #14
    DaveInDenver

    DaveInDenver Not Actually in Denver

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    BTW, do you need an actual 7 pin? Those 3 extra pins are the connections for brakes, aux +12V (to charge a battery) and running lights.

    If all you need is the plug they make 4-to-7 adapters but if you need the 3 extra circuits to be functional then it's probably going to be cleanest to add the factory harness.

    Otherwise you have to figure out how to tap in and wire them up. Which seems silly when Toyota already did that and put them all into nice connectors for you.

    30717_1000.jpg
     
  15. Dec 13, 2017 at 1:14 PM
    #15
    iLLogics

    iLLogics Well-Known Member

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    Judging by this pic. I'd say a trailer came unhitched from the truck at some point in its life which probably took out the original 7 pin.
     
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  16. Dec 13, 2017 at 2:03 PM
    #16
    Too Stroked

    Too Stroked Well-Known Member

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    The only "port" that particular plug and harness was installed in was somebody's car port. The factory 7 pin plug and harness appears to have gone missing for some reason.
     
  17. Dec 13, 2017 at 6:10 PM
    #17
    KactusJack

    KactusJack [OP] Well-Known Member

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    We rent a pop-up camper once or twice a year. Even though it doesn't have brakes or it's own battery, it has a 7-pin connector. We've been pulling it with my wife's Subaru, which has only a 4-pin connector. I had to make an adapter to hook up the trailer lights because no one around here sells one. I figured with the truck, it'd be nice to have both connectors permanently installed, and wired correctly should I ever need to pull a trailer with brakes.
     
  18. Dec 17, 2017 at 2:08 PM
    #18
    KactusJack

    KactusJack [OP] Well-Known Member

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    So I go to the local RV store to get the parts to make an adapter to at least have lights through a 7-pin connection. They now have two pre-made adapters (the same place that told me 2 years ago that no company they know of makes such an adapter; guess they do now.) Both adapter models simply plug into an existing 4-pin, to provide light circuits to a 7-pin. One for $18 is simply that - plug into the 4-pin and go. Another one, for about $36, does the same, but is a bit better built, includes a mounting bracket for the 7-pin, and also includes a 4-pin connector so you can just leave it plugged into your existing 4-pin. Such an adapter will work for me, at least until such time as I need to pull something that has it's own brakes and/or battery.

    Thanks all for the ideas!
     
    RON_TRD Sport and Pork Chopper like this.
  19. Feb 1, 2019 at 2:43 PM
    #19
    Benny123

    Benny123 Kid from the late 70s

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    Replacing everything worn, broken, and rusted.
    If I just want to replace the rusted mounting bracket, how do I remove the connector? I see the harness connector above the bumper support, and I see the bolts connected to the plate. But how do you remove the socket from the plate? Does it twist apart?
     
    Last edited: Feb 1, 2019
    Itsme_Bernie likes this.
  20. May 22, 2020 at 7:06 AM
    #20
    Itsme_Bernie

    Itsme_Bernie New Member

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    Did you ever figure this out?

    Bernie
     

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