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I bought a T-One Vehicle Wiring Harness with 4 Pole Trailer Connector for my 2011 Hyundai Sonata which tows a 2000 Starcraft Venture 2107 pop up camper. When I make the connections to the camper, the blinker works and then shorts. General RV said the camper wiring is fine and that the foreign cars have smaller wires in the tail light assembly and I am overloading the wires. They said to look for something that allows you to connect to the battery to get more power. Any ideas

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: Trailer brakes

Take a 12 volt test light... the kind that has a spring loaded clip to hold the probe into the wire, and insert it into the wire just before the trailer plug, vehicle side. (Blue I think) If there is a connection, the brake should see it and you should have an indicator light. When you activate the brake the test light should lite up. If not, move up to the brake actuator and test the blue wire. If there is nothing at the actuator, check the black wire. It is power to the controller. If no power there, check fuses again. If it does pick it up at the plug, connect the trailer and test the trailer itself. First ground to the trailer and then to the truck. Most problems are ground wire related. Then move to the axle and test it there. For the brakes to work, and even show on the indicator, there has to be a ground and power to the brakes themselves. There are 2 wires to each brake... a ground and a power. Test across both wires to make sure you have power and ground. You can also hook another trailer to your truck or another truck to your trailer. Lights can work through trailer ball ground. Brakes can't. leave the trailer unhooked from the trailer and hook the wiring up and test the lights. That usually will indicate a good or faulty ground. Also make sure there is a GOOD ground to the truck frame/body. Also try They have a great website with lots of info. Hope this helps. Mike

Posted on Oct 07, 2009

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SOURCE: Wiring problem for 2005 Pathfinder trailer hitch

Sounds like the converter is bad. Go to and check the testing section. Hope this helps.

Posted on Jan 29, 2010

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SOURCE: Tow bar trailer socket wiring connection point to car wiring?

The connectors for towing wire harnesses on foresters are generally on the passenger side, below the rear taillight inside the cargo space. some require pulling up the foam block that is between the spare tire compartment and the taillight. Check where you replace the tailights from inside the car, if there isn't a matching connector hanging out there, check around the spare tire compartment, see if you can remove the carpeted foam block next to the compartment and find the plug under there.

Posted on Mar 03, 2010

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How do I install the manual non quick connect version of a 4 pole wiring harness for a trailer on a 2008 Hyundai Sonata gls please? I've got the taps or can soldier them in.

First, if it has seperate turn signals from brakes. You will need a converter if you contact hyundia they may have a setup that plugs in without cutting or splicing

Apr 10, 2015 | Hyundai 2008 Sonata GLS

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I want to tap into the reverse tail light wiring for a surge brake solenioid,

We at not living in the 1960's

You tap into any of today's vehicle circuits, your
asking for unknown problems

Have you considered you said a solenoid,& do you
know the current draw on that solenoid

Best design a new circuit using a relay & control it with
the back up switch ,if the can handle the extra current

Need wiring diagrams,some math & ohm's law there

Feb 07, 2013 | 2010 Hyundai Santa Fe

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How do you change oxygen sensors on a 2000 hyundai sonata

Locate the two oxygen sensors on either side of the Sonata's catalytic converter on the exhaust manifold. The Sonata's oxygen sensor is gold and shaped liked a spark plug.

  • 2 Remove the Sonata's wiring harness from the end of the two oxygen sensors using your fingers. Do not damage the end of Sonata's wiring harness.
  • 3 Remove the two oxygen sensors from the Sonata's manifold using the oxygen sensor wrench.
  • 4 Apply the anti-seize compound to the threads of the Sonata's two new oxygen sensors.
  • 5 Install the two new oxygen sensors to the Sonata's manifold using the oxygen sensor wrench. Re-attach the wiring harness to the two new oxygen sensors using your fingers.
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    Instructions for wiring a moving trailer connector


    Trailer Wiring Diagrams 4 Way Systems

    4 way flat molded connectors allow basic hookup for three lighting functions; right turn signal / stop light (green), left turn signal / stop light (yellow), taillight / license / side marker (brown) and a ground (white).

    4%20way%20wiring.jpg 4way_vehicle.jpg 4 way tow vehicle side.
    4way_trailer.jpg 4 way trailer side.
    5 Way Systems

    Same as 4 way system listed above but adds a extra blue wire for brake signal or auxiliary power. Used on pop up camper trailers or utility / boat trailers.
    5way_vehicle.jpg 5 way tow vehicle side.
    5way_trailer.jpg 5 way trailer side.
    6 Way System, Rectangle Plug 3/4 inch by 1 inch 6 way rectangle connectors right turn signal (green), left turn signal (yellow), taillight (brown), ground (white). The red and blue wire can be used for brake control or auxiliary. Use on a small motorcycle trailer, snowmobile trailer or utility trailer. Can also be used as custom wiring on trailers with 3 light/wire systems. See "Tow Vehicle Taillight Wiring" below.
    6way_rectangle_1.jpg 6 way tow vehicle side.
    6way_rectangle_2.jpg 6 way trailer side.
    6 Way Systems, Round Plug

    Round 1 1/4" diameter metal connector allows 1 or 2 additional wiring and lighting functions such as back up lights, auxiliary 12v power or electric brakes. Note: The black (sometimes red) 12v and blue electric brakes wire may need to be reversed to suit the trailer. Check with a test light or VOM. Uses: horse trailer, travel trailers, landscaping trailer, car trailer, etc.

    6way_vehicle.jpg 6 way tow vehicle side.
    6way_trailer.jpg 6 way trailer side.
    7 Way Systems

    Round 2" diameter connector allows additional pin for auxiliary 12 volt power or backup lights. Uses: heavy duty landscaping trailer, car trailer, boat trailers, horse trailer, travel trailer, construction trailer, etc. Check with a test light or VOM.

    7way_vehicle.jpg 7 way RV flat blade tow vehicle side.
    7way_trailer.jpg 7 way RV flat blade trailer side.

    Jan 01, 2011 | 2001 Pontiac Montana

    1 Answer

    Trailer wiring problem. Tow vehicle is a 2008 Grand Caravan with 4 wire plug. Double checked, plug function works fine. When trailer is plugged to tow vehicle with tow vehicle lights OFF the trailer...

    Most likely the brown wire from the trailer connector is connected to a constant battery voltage source, and it should be connected to the vehicle running light circuit, however someone might have wired the trailer connector up that way on purpose so that the trailer does not draw power from the vehicle running lights and possibly damage the vehicle running light circuit. (Dodge/Chrysler vehicles do have delicate lighting systems) Here are some images to help assist you, and the 4 way connector is the same as the 5 way connector just without the blue wire for the trailer brakes.






    Jul 06, 2010 | 2008 Dodge Grand Caravan

    1 Answer

    I do not have power on the aux. terminal in the trailer plug on a 2008 dodge ram. Any ideas?

    You have got 7 pin trailer connector that was included in the optional trailer tow package. This trailer tow package also includes an electric trailer brake wiring provision that terminates at a connector located on top of the large body harness connection under the instrument panel to the left of the break pedal, as well as an electric trailer brake pigtail harness and an instruction card that are stored in the glove box when the vehicle is shipped from the factory. You will need to add an electric brake controller of your choice that will plug-in to the harness and that will also give you power on your auxiliary circuit.

    Oct 04, 2009 | 2008 Dodge Ram Pickup 2500

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    Can you tell me where the the trailer wiring

    they don't all come with the towing package, it is an option!

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    Towing light problem on wiring them up.

    It looks like there could be a service bulletin to fix this.

    Toyota will initiate a Special Service Campaign to replace the Toyota Trailer Towing Wire Harness
    Converter (converter) on certain 2000 model year Tundra and 1999 - 2000 model year Tacoma
    vehicles equipped with a genuine Toyota Trailer Towing Hitch or Bumper Hitch. This accessory
    is included in the Towing Hitch Kit installed at ports (PIO) and by dealers (***); it is also sold by
    dealers as an over-the-counter or service part.
    An electrical short or open circuit can cause a fault in the genuine Toyota Trailer Towing Wire Harness
    Converter (converter). This can cause a failure of the converter, and if a trailer is being towed at the time,
    non-operation of the trailer lights. In limited cases, the converter housing could become heat-deformed.
    In the case of the Tundra, the circuitry utilized in the converter was inadequate to properly manage
    vehicle and/or trailer-side voltage spikes. If the converter is exposed to a voltage spike it may cause an
    electrical short or open circuit within the converter.
    As for the Tacoma, due to deficient waterproofing and improper installation location of the converter,
    which is mounted in the lower portion of the taillight cavity of the vehicle, an electrical short circuit will
    occur if water enters the converter housing.
    The following vital information is provided to inform you and your staff of the campaign notification
    schedule and your degree of involvement.
    1. Owner Notification Letter Mailing Date
    The owner notification will be conducted in two phases:
    • The first phase will be launched in late August and involve vehicles equipped with port
    installed (PIO) genuine Toyota Towing Hitch Kits.
    • The remaining vehicle owners, whose vehicles may be equipped with a dealer installed (***)
    genuine Toyota Trailer Towing Wire Harness Converter, will be notified in the second phase
    to be launched in early September.
    We have attached copies of the owner notification letters for your reference.
    If you are contacted by an owner of an involved vehicle, who has not yet received a notification,
    please verify eligibility through TDN or TIS, inspect the vehicle to assure it is equipped with the
    affected part, and perform repairs as outlined in the attached Technical Instructions.

    Jul 12, 2009 | 1999 Toyota Tacoma PreRunner

    1 Answer

    Towing wires

    Here is a Utube video for you for the wire hookups!

    May 10, 2009 | 2008 Hyundai Sonata

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