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7 pin trailer wiring where to connect 95.5 truck

Discussion in '1st Gen. Tacomas (1995-2004)' started by 95v6mt, Sep 1, 2020.

  1. Sep 1, 2020 at 6:10 PM
    #1
    95v6mt

    95v6mt [OP] Well-Known Member

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    scott
    maryland
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    Okay guys I need your wonderful advice. I am putting a 7 pin conversion plug on my truck, I have the 4 pin plug on the truck already.

    Any hints on if we have a plug hidden, or where would you connect it to?

    I need power ( for brakes so a heavier load ), ground I understand, and probably just connect to the switch on the brake pedal for the last one. Also I need the aux power to the trailer.

    I was thinking of putting a 30 amp relay at the battery to shut the aux and the brake power off, what would/should I connect that relay to for control?
     
  2. Sep 1, 2020 at 6:16 PM
    #2
    Kleenax

    Kleenax Well-Known Member

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    New frame & stuff CBI bolt-on Sliders
    I wired my truck with this: https://www.etrailer.com/Wiring/Tow-Ready/30717.html

    And then I added a Tekonsha Prodigy P3 Brake controller. Here it is for your truck:
    https://www.etrailer.com/Trailer-Brake-Controller/Toyota/Tacoma/1995/90195.html?VehicleID=1995203497

    There is/are excellent wiring diagrams that tell you everything to do to wire it properly too. Worked GREAT for my truck, and I just literally take the brake controller control off when I don't need it and stow it in the glove box.
     
  3. Sep 1, 2020 at 6:29 PM
    #3
    95v6mt

    95v6mt [OP] Well-Known Member

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    I already bought and received a reese controller.

    I really just need a "on" wire some where in the front of the truck prefer it to be only key in run position so I dont risk killing the battery with the key in the acc position.
     
  4. Sep 2, 2020 at 1:23 AM
    #4
    Wyoming09

    Wyoming09 Well-Known Member

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    Super Springs
    I have never used a adapter to install 7 pin plugs. 7 pin is all I use .

    All connections got hard wired to the tail light harness mechanical connection soldered and heat shrink.

    Do you have a problem with your battery going dead now??

    Unless the brake control unit has a problem or the brake light switch fails in the closed position leaving your brake lights on all week you should not have a battery drain.

    While it is your vehicle and if you want to power the brake control via switched power .
     
  5. Sep 2, 2020 at 6:00 AM
    #5
    95v6mt

    95v6mt [OP] Well-Known Member

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    I more want the aux power switched. That way the trailer can not drain the starting battery if I dont unplug.
    The truck has a 4 pin on it already, I bought the 7 pin that has a spot for the 4 pin to plug into, so I dont have to redo all those connections.
    No issues with the battery draining now, I just dont want them later.

    My plan at this point is to run a 10 gauge with a fuse from the battery to a relay under the dash, triggered by the radio power. The wire out of the relay will go to the aux power on the jack, maybe the brake controller maybe not. I have a stock switch I can put in the dash that the relay trigger power can run thru, that way I have the option of shutting it off. I am not sure I am doing the switch in the dash but I might.
     
  6. Sep 2, 2020 at 7:29 PM
    #6
    jbrandt

    jbrandt ......LOADING

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    IMO that's more trouble than it's worth. Why would you not unplug it?

    Just unplug it. I did that all the time when I towed my popup. If we stopped for dinner or something, I'd unplug the trailer and switch the fridge (it was 12v/120/LP gas) to propane so it wouldn't drain either battery. I don't worry about it with my hard side, as the fridge is all propane anyway.

    I ran a class III hidden hitch with a combo 4-pin/7-pin. It was great not having to mess with an adapter if I needed to tow my utility trailer (4-pin).
     
    Wyoming09 likes this.
  7. Sep 15, 2020 at 4:26 AM
    #7
    BNG_PA

    BNG_PA Member

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    2.5’ Rancho Quick Lift & OME
    I just used a 30 or 40 amp breaker (can’t remember which?) for the line power...directly from the battery. I like those over relays as they are to resettable style and from what I’ve read (not an expert), they hold up.

    As you stated, I did tap the brake pedal switch and ran that
    back with a 12v accessory. Also, I replaced my taillight converter (18 years old) as my trailer lights would function erratically at times.

    My brake controller has not effected my battery (that I can tell), and even upgrading a single axle landscape trailer has reduced the front brakes needing replaced every 2-3 years.

    Here’s my controller, which I also have in my 2020 TRD Sport.

    Tekonsha 90160 Primus IQ Electronic Brake Control
     
  8. Oct 16, 2020 at 8:16 PM
    #8
    Laisseraller

    Laisseraller Active Member

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    I purchase the trailer hitch wire kit at Uhaul installed it using their schematic seems to work fine.
    mine is a 2004 Toyota Prerunner 2.7L Automatic
     

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