trailer brakes with 4 pins?

I am a RV newbie who asks newbie type questions. We purchased a T@B 320S from Nucamp. It has an Autowbrake electric brake controller and a 7 pin trailer connection. Our tow vehicle is a Subaru Outback 2015 with a 4 pin connection. The T@B dealer supplied us with a 7-to-4 pin adapter.  All appears to be properly wired (all the trailer lights work) but I cannot tell whether I have trailer brakes when towing. Question - assuming everything is set up correctly, do i have trailer brakes?

Comments

  • jason330ijason330i Posts: 72Member
    stevea said:
    I am a RV newbie who asks newbie type questions. We purchased a T@B 320S from Nucamp. It has an Autowbrake electric brake controller and a 7 pin trailer connection. Our tow vehicle is a Subaru Outback 2015 with a 4 pin connection. The T@B dealer supplied us with a 7-to-4 pin adapter.  All appears to be properly wired (all the trailer lights work) but I cannot tell whether I have trailer brakes when towing. Question - assuming everything is set up correctly, do i have trailer brakes?
    AuTowBrake looks like an interesting brake controller. Similar to an RF brake controller without the RF. Basically an electronic surge brake system. It does not appear to have a manual override though. So it might be hard to determine whether it’s working right. Does the manual have any suggestions on how to test it?

    2017 T@b 320 S

    2017 Kia Sorento SXL AWD

  • ScottGScottG Posts: 1,771Moderator
    edited October 2017
    Nope. The 4-pin connectors are strictly for the lights. The 7-pin connectors add circuits for electric brakes, 12V camper power/battery charging, and back-up lights or other auxiliary devices.

    In order for that extra stuff to work, you would need to have a properly wired 7-pin connector on your Subaru. 
    2015 T@B S
  • SAMSAM Posts: 1,628Member
    Do you mean your RV dealer changed your Subaru 4 pin to a 7 pin, so now you have a 7 pin?  If you have a 7 pin you should now have brakes if your controller is working.  Do you know how to adjust the brakes?  Is it RF or a standard brake controller?  You may want to start with a 7 pin tester that you
    can get at Walmart just to confirm a working 7 pin.

    Sharon and John - Cleveland Heights, Ohio. Blue and Silver 2017 CSS towed by a 2015 Salsa Red Toyota Sienna
  • VernaVerna Posts: 4,395Administrator
    Please read the reply from @ScottG. @stevea Your T@B brakes are not working and your T@B battery is not being charged while driving by your tow vehicle.  You will need to have your 4-pin changed to be a properly wired 7-pin. 
    Verna, Indianapolis, Indiana; 2014 T@B S M@X, white/red, INDIANA  H@@SIER; towed by 2015 Toyota Tacoma V6 TRD 4x4; T@B Administrator
  • Michigan_MikeMichigan_Mike Posts: 2,170Administrator
    stevea said:
    I am a RV newbie who asks newbie type questions. We purchased a T@B 320S from Nucamp. It has an Autowbrake electric brake controller and a 7 pin trailer connection. Our tow vehicle is a Subaru Outback 2015 with a 4 pin connection. The T@B dealer supplied us with a 7-to-4 pin adapter.  All appears to be properly wired (all the trailer lights work) but I cannot tell whether I have trailer brakes when towing. Question - assuming everything is set up correctly, do i have trailer brakes?
    Another thing you may want to do while you are contemplating getting your vehicle wired up with a seven-pin receptacle is to purchase a 15 amp to 30 amp adapter for your trailer power cord as this will allow you to plug the trailer in to a receptacle in your garage or home.  This will allow your electric converter to run and will also charge up your battery.  Make sure you check the on/off battery switch (turn it to on when you want to charge the battery) that should be located in the front tub on the trailer.  Flip the battery switch off when the trailer is parked and idle to help preserve the battery too.   

    Camco 55223 15M/30F AMP PowerGrip Adapter

    Mike Smith 
    Linden, Mi
    2015 T@B Max S
    Attached Image
  • DalehelmanDalehelman Posts: 1,353Member
    edited October 2017
    The key word here is Autowbrake. It is  apparently a self contained unit on the trailer that does not require a 7 pin plug or any connection to the tow vehicle. Search Autowbrake for more information. You will most likely need a 5 pin plug if you want to charge you trailer battery while traveling.
    https://autowbrake.com/
    1. Hash  T@B Fun
  • ScottGScottG Posts: 1,771Moderator
    Good catch, Dale.

    I wonder how/why the Autowbrake came to be installed on this particular T@B. I'm pretty sure that's not standard equipment.
    2015 T@B S
  • SAMSAM Posts: 1,628Member
    OP does not say the model year of his Tab, so I wonder if he purchased used and the previous owner had it installed.  TearDrop Shop sells them.
    Sharon and John - Cleveland Heights, Ohio. Blue and Silver 2017 CSS towed by a 2015 Salsa Red Toyota Sienna
  • DalehelmanDalehelman Posts: 1,353Member
    Looks like a great option if you're tow vehicle doesn't have a seven pin. Not that expensive if you need to have your TV wired. I think it's a better option than wireless controllers and about the same price maybe a little less. Good  solution if you have a European TV.
    1. Hash  T@B Fun
  • steveastevea Posts: 5Member
    Thanks all. My T@B 230S is model year 2017. The 4-to-7 pin adapter is a Pollak 12-705 and has a 7-pin receptacle on one end, and a 4-pin connector plug on the other, and no other extraneous wiring. The dealer, whom I am not completely comfortable with yet, MIGHT have put the Autowbrake unit on the trailer once he realized I had a Subaru. I will look into Autowbrake some more, and may take all this back to the dealer for clarification. 
  • ScottGScottG Posts: 1,771Moderator
    Yup, all that adapter is going to do is connect the exiting four pins on your Subaru with their corresponding four contacts on the trailer's 7-pin pigtail. That way the lights will work and you'll be street legal.

    I wondered if maybe the dealer just took the liberty of installing the Autowbrake when they saw what you were planning to tow with. It would certainly be worth asking.  
    2015 T@B S
  • TabberJohnTabberJohn Posts: 412Member
    stevea said:
    Question - assuming everything is set up correctly, do i have trailer brakes?
    According to the Autowbrake website a remote fob is included for testing.
    You drive 10-15 mph then press the fob button. You should notice the trailer tugging on the TV as the brakes engage.
    See last paragraph here: https://autowbrake.com/p/autowbrake-installation
    2015 T@B Max S (White/Silver) -> 2014 Ford Escape 2.0L (turbo, AWD, factory tow)
  • steveastevea Posts: 5Member
    Thank you TabberJohn
  • steveastevea Posts: 5Member
    UPDATE. After talking to an Autowbrake techie, turns out I don't have trailer brakes. You need power from the tow vehicle battery in order to operate the brake magnets on the trailer, even though the brake controller is located on the trailer. So I need a 7-way conversion on my 2015 Subaru Outback. Furthermore, the Autowbrake product includes a Key FOB that allows you to test the trailer brakes while driving and after they've been properly configured. Somehow the dealer did not supply me the Key FOB. Autowbrake is kindly supplying me with that. 
  • ScottGScottG Posts: 1,771Moderator
    Thanks, for the followup, @stevia. I was wondering where the power to run the brakes come from when using Autowbrake. Having it come from the camper battery seems like a poor idea, particularly if your battery has no way to get charged while driving.

    I'm still curious as to who installed the Autowbrake on your trailer, and why. 
    2015 T@B S
  • DalehelmanDalehelman Posts: 1,353Member
    According to their installation video. It can be powered through TV tail lights. It just requires driving with your head lights or parking lights on. 
    1. Hash  T@B Fun
  • ScottGScottG Posts: 1,771Moderator
    According to their installation video. It can be powered through TV tail lights. It just requires driving with your head lights or parking lights on. 
    Ahhh, I had actually thought of that, but wasn't sure if the tail light wiring was robust enough to handle the additional draw of the brakes (whatever that is).
    2015 T@B S
  • DalehelmanDalehelman Posts: 1,353Member
    I think Autowbrake is just trying to make their product as simple and nonintrusive to the TV as possible. Which I think they have done. I would seriously consider it if I had vehicle that was not prewired for towing. I like the fact that once it is first set up no other adjustments is needed. I also like that it works like a surge brake. JMHO
    1. Hash  T@B Fun
  • steveastevea Posts: 5Member
    UPDATE, I recently discussed this with the dealer, who installed my Autowbrake unit. Turns out he had wired the unit to run off the tail lights. Problem is he failed to inform me about any of this -- I had to have my lights on in order to have trailer brakes. Never occurred to me, and I almost never drive with my headlights on during the day. Anyway, I now have a 7-way on my Subaru, and I think that's a better solution. Live and learn. 
Sign In or Register to comment.