Select Your Vehicle

View Cart



Filter Questions and Answers:


reset filter

Expert Answers about Wiring


  • Recommended Wiring and Brake Controller for a 2006 Nissan Titan without the Tow Package
  • For a 2006 Nissan Titan with no wiring done you will need to first install the 4-way wiring harness, I recommend the # 119147KIT, because we have had better luck with this brand versus the Curt. Next you will need to outfit your vehicle with a 7-way, this will allow you to use a brake controller for a trailer with brakes. The wiring of the 7-way allows for the correct brake signals to be transferred opposed to just the 4-way. For this I recommend the # ETBC7 adapter. This kit will...
    view full answer...

  • 7-Way Wiring Harness for 2013 Ram 1500
  • Yes, the Pollak 7-Pole and 4-Pole Trailer Connector # HM40975-11998 could be hardwired to your 2013 Ram 1500 but we do offer no-splicing direct plug-in 7-way 5th wheel harness kits like # PK11893-11932 that fits the Ram with factory 7-way. If your truck has neither a factory 7-way nor a 4-pole you can instead use 4-pole kit # 119179KIT and then add our # ETBC7 7-way kit. Together these two parts will give you everything you need for a fully-functional 7-way that includes circuits for...
    view full answer...

  • Parts Needed to Add 4-Way to Fifth Wheel Trailer for Towing Second Trailer
  • What you would need is the part # 18252. This is a 72 inch long 4-way connector that comes with quick-connects so that it can easily be attached to a trailer's taillight circuits. It would be just a matter of tapping all of the correct circuits for the wiring. Adding the 4-way to the vehicle would be pretty difficult and would require quite a bit of wiring.
    view full answer...

  • Adapter Availability to Go from 7-Way Round to 7-Way Blade
  • Sounds like you are either looking for the part # F77R which has a 7-way blade male and a 7-way female round connector or the part # PK12-724 which has 7-way round male and 7-way blade female.
    view full answer...

  • Recommended 7-Pole Round Plug & Play Wiring Harness Adapter for 2005 Ford Super Duty Factory Wiring
  • It sounds like your 2005 Ford Super Duty was outfitted with the 7-way blade system which is the most common in the market today. To adapt your 7-way blade to a 7-pole round for your trailer, I recommend the Pollack # PK12728. This 7-pole connector is prewired to simply plug into your truck's 7-way plug. It has the # PK11720 connector you referenced but is pre-wired like you are desiring. A great mounting bracket for the # PK12728 is the # PK11771. I have linked all the above...
    view full answer...

  • Availability of 4-Way Wishbone Wiring Harness with Shorter Wire Lead
  • The wishbone harness with the shortest amount of wire lead has 20 feet of wire and a 30 inch ground wire, the Optronics 20 Foot Wishbone 4-Way Trailer Wiring Harness # A20WB. I wish we had a shorter option for you but our manufacturers don't offer a wishbone harness with a shorter lead. I double checked with Optronics and the 20 ft lead is the shortest they offer with a wishbone harness. If you'd rather use a connector with a shorter lead, the connector with a lead closest to the 18...
    view full answer...

  • Can Group 24 and Group 27 batteries be Wired Together in Parallel
  • The group number that a battery belongs to refers to its casing size so you can use a group 24 and group 27 battery together.
    view full answer...

  • Recommended 4-Way And 7-Way Trailer Connector For 2011 Jeep Grand Cherokee With 4-Way
  • We have exactly what you are looking for. I recommend the Hopkins Adapter 4-Pole to 7-Pole and 4-Pole, part # 37185. This plugs into the 4-way at the back of your Jeep and gives you a 4-way and 7-way. Depending on what you intend to use in the 7-way the other wires will need to be attached. The 4 wire functions are white for ground, blue for a brake controller if needed, black is the hot lead and used for a 12V power supply, and purple is an auxiliary. If any of these functions are...
    view full answer...

  • 7-Way Adapter Recommendation for 2016 Toyota Tacoma
  • If you have the 4-way harness part # C56282 installed on your 2016 Toyota Tacoma you could cut off the 4-way and wire it to the # HM40975-11998 if you wanted but an easier option would be to use the # 37185 in place of the Hopkins. It allows you to just plug the 4-ways together and then run the additional circuits as needed to give you a 7-way. If the goal is to install a brake controller you instead would wan the part # ETBC7 which also includes the 37185 but comes with everything...
    view full answer...

  • trailer lights
  • First thing you should do at this point is test the 4-way of the wiring harness with a circuit tester part # 3808 for voltage on all of the right pins when the taillight signals are being applied. Just like in the video I attached. If the voltage checks out there but the trailer lights still don't function right then the problem is on the trailer wiring. That would mean that problem is either due to a ground issue or a short issue. Make sure that the trailer side connector are clean...
    view full answer...

  • Replacement Vehicle 7-Way Recommendation that Uses Traditional Wire Colors
  • The Pollak part # HM40975-11998 is a replacement vehicle side 7-way that uses the traditional wire colors where the brown is taillight and green is right turn/stop. I couldn't agree more on how annoying it is that there is two different ways the 7-way wiring is ran and the difference is the brown and green wire colors are swapped. It had to have been a mistake somebody made in the early days of trailering that they just went with.
    view full answer...

  • Will Hopkins Endurance Multi-Tow 7-Way and 4-Way Trailer Connector Plug into a 2001 Chevy Tahoe
  • On your 2001 Chevy Tahoe look for a round connector which will look like # PK11998. If you find this connector at the back of the vehicle in the vicinity of the spare tire then yes, 7-Way connector # HM40950 will plug right in. If you find a bundle of wires without a plug then you will need to also use # PK11998 to hardwire into that wire bundle. The functions of the wires for PK11998 are: Red - Left Turn and Stop White - Ground Blue - Electric Brakes Green - Right Turn...
    view full answer...

  • Adding a 7-Way Trailer Connector to a 2016 Honda Pilot
  • If the 7-Way trailer connector on your 2016 Honda Pilot is the factory installed 7-Way then all of the functions, including the 12 volt power circuit, should be active. But on models that did not come with the factory harness the connection and wiring is there but may not be active. However, you will not have to hardwire in a 7-Way to your Pilot because you can use # 118274. It plugs into the factory connection point and includes the fuses and relays to make it active. I have linked...
    view full answer...

  • Solution for Trailer with 5-Way that Does not Match Pollak 5-Way PK11502
  • There are 5-way rounds like the part # PK11502 and there are 5-way flats like the # HM47900. I am not sure which you have tried but it sounds like your motorcycle uses a unique style of connector. Which if you have the # PK11502 already you could just replace what's on the trailer with the part # PK11501 and be set.
    view full answer...

  • Can Wire Larger than 10 Gauge be Used to Wire a Trailer
  • It depends on the connector and what it accepts. You usually don't see wiring larger than 10 gauge in use on a trailer because the larger the wire the harder it is to push electricity back on that wire. Automotive grade 10 gauge wire such as # 10-1-1 (sold by the foot) at a length of 20 feet can handle up to about 46 amps so it does a good job in that regard.
    view full answer...

  • Recommended Wiring Harness for 2005 Mercedes-Benz ML350 Special Edition with Factory Trailer Hitch
  • Don't worry, I can help outfit your 2005 Mercedes-Benz ML350. The wiring harness that I recommend for your 2-wire system is the # 119190KIT. I have linked the instructions for you to see how the 2-wire system your ML350 has will install. You mentioned the two wires as turn and brake light being separate but you did not mention the tail light wire, you could in fact have a 3-wire system which the # 119190KIT will also fit, best thing to do is to use the included tester for all the functions...
    view full answer...

  • How to Identify Functions for Each Wire on a Trailer
  • Trailer wiring often uses specific color wires for a particular lighting function but there is no guarantee that your trailer uses the common wire colors. This just means that you'll test the wires on the trailer to see what each one does; then you will know how to connect it. You can refer to the linked article on trailer wiring that shows the usual configurations of 4-pole, 5-pole, 6-pole and 7-way wiring. Photos are included to show you the usual wiring colors for each function. In...
    view full answer...

  • 4-Way Trailer Wiring Harness Recommendation to Add 4-Way to Rear of 5th Wheel for Second Trailer
  • What you would need is the part # 18252. This is a 72 inch long 4-way connector that comes with quick-disconnects so that it can easily be attached to a trailer's taillight circuits. It would be just a matter of tapping all of the correct circuits for the wiring.
    view full answer...

  • Trailer Wiring Recommendation for Motorhome to Allow Flat Towing Lighting to Connect
  • Does your motorhome have trailer wiring installed on it already? If so, you wouldn't need to add anything to it as it would already be converted properly. If not you would need the trailer wiring kit part # 119190KIT that would convert the separate signals to combined. Then to convert it to a 7-way you would need the part # 37185. For lighting on the tow vehicle you can use the diode kit, # RM-15267, and not have to worry about cutting into the taillight housing. This will splice into...
    view full answer...

  • Comparing Hopkins A75TB & Might Cords A10-7275VP 7-Way to 5-Flat Wiring Adapters
  • We have sold many of the Hopkins 7 Pole to 5 Pole Adapter # A75TB and more than 50 customers have reviewed it quite favorably, as you noted. It has nearly a perfect satisfaction rating. The similar Might Cords adapter # A10-7275VP is new enough that we do not yet have the customer feedback. If it were me I would spend the extra buck for the item with an established good track record.
    view full answer...

  • Trailer Wiring Adapter to Join Truck 7-Way with Trailer 4-Pole Connector
  • It sounds like your Durango has what we call a 7-way blade type trailer socket, which is shown in the linked photo. This common trailer connector uses flat or blade type contacts. We offer adapters to join this type of connector to the 4-pole you have on your trailer and you can see all on the linked page. For example, Pollak # PK12716 plugs in to your Durango's 7-way and provides a connection point for the trailer's 4-pole wiring harness. Others like the coiled-cable adapter # HM47065...
    view full answer...

  • Wiring Harness Recommendation For 2004 Ford Thunderbird With Low-Side-Switching
  • To be able to install a trailer connector on your 2004 Thunderbird you will need wiring like part # 36345 that is specifically designed for your wiring. This is a hardwire installation. We do not offer a plug-and-play option. I found that your Thunderbird has what is called 'low-side-switching'. When installing this harness you will need to use a circuit tester with reverse polarity. Unfortunately we do not offer these but you should be able to find that item at a local hardware store....
    view full answer...

  • 4-Pole Wiring Harness for 1998 Volvo V70 for Motorcycle Trailer Lights
  • We do offer 4-pole wiring harness kits for your 1998 Volvo V70 and these are all hard-wired types displayed on the linked page. These kits wire in to the leads at the Volvo's taillights. None of these is a plug-and-play option which might be available from a Volvo dealership, albeit at a premium price, IF it is available. Of the available options I suggest the reliable Tekonsha # 119147KIT for its combination of reasonable price and high 7.5-amp taillight circuit current capacity which...
    view full answer...

  • What Wire Gauge is Used for Pilot Plug-and-Go Trailer Wiring Extender # TC-500
  • I spoke with my contact at Pilot about Plug-and-Go Trailer Wiring Extender # TC-500 and he said that the wire gauge used is 16 gauge so you're good to go! I have also linked a video review for you.
    view full answer...

  • Causes For Blown Fuses On Tractor Trailer
  • There can be a couple reasons fuses keep blowing but most of the time it is a short caused by a broken or damaged wire shorting out on metal. I recommend inspecting the wiring on the trailer and the truck to make sure all of the wires are intact and have not been damaged. Another reason may be if you added trailer lights and they are just simply drawing too much power. That can also cause the blown fuses.
    view full answer...

  • Diagram that Matches Pin Out of Bargman 7-Way, RV-Style Connector w/ 8' Long Coiled Cable
  • The wires of the connector on the part # 54006-044 are sealed and there isn't a way to remove them. If you check out the diagram I attached you can see how the pins o the connector are organized.
    view full answer...

  • Wiring Up a New 7-Way on Vehicle that Uses Non-Standard Wire Colors
  • I wish all trailer wiring harnesses used the same colors but unfortunately they don't and in your case the only solution is to test each of the wires with a circuit tester like part # 3808 to determine it's function and then wire it to the chart I attached by function.
    view full answer...

  • Which Pin of a 7-Way Will Have Power All of the Time
  • On a trailer 7-way the pin in the 1:00 position is the 12 volt accessory circuit that would have 12 volts of power all the time. I am not sure exactly what you mean by # 4 but I attached a picture of a 7-way diagram that shows what all of the pins are for.
    view full answer...

  • Recommendation of 7-Way to 7-Blade and 4-Pole Wiring Harness on an RV
  • The Hopkins Adapter 4-Pole to 7-Pole and 4-Pole # 37185 can be a solution for you. But we don't carry an adapter to plug into your RVs existing 7-way trailer connector to give you both of the connectors you want. On the Hopkins adapter, the 4-Way plug isn't going to just plug into your RV so you're going to need to cut the 4-flat end of it off. Then you'll also cut off the 7-Way that's currently on the RV. After that you'll essentially wire the Hopkins adapter and the wiring on your...
    view full answer...

  • Troubleshooting 4-Pole Trailer Wiring with No Stop/Turn Signals on Honda Pilot
  • In both 4-pole and 7-way trailer wiring the brake and turn signals are carried on the same wires. On a 4-pole connector like the one # 18004 that you referenced the left turn and brake signals are carried on the yellow wire and the right turn and brake signals are on the green wire. On a 7-way vehicle socket, see the linked photo please, the stop/turn signals are carried on the pins at the 3- and 9-o-clock positions. There are several possible causes for the stop/turn lights on your...
    view full answer...

  • Can Truck with 5-Way Connector Connect to Trailer with 4-Way
  • You should be able to just plug the to connectors in and have the 5th circuit just not be used. Or you can cut off the 4-way and install a 5-way with part # HM47900.
    view full answer...

  • Cargo Carrier, Light Kit, and Wiring Harness for a 2000 Honda Accord
  • I will be happy to help you out. First, since all of the trailer hitches for the 2000 Honda Accord are Class I hitches you will need a cargo carrier that is rated for a Class I hitch. I have included a link to the available options for you. If you go with carrier # 6500 there is a light kit for it, # 6504, that comes with license plate mounting bracket. The left light has a light in it to illuminate the license plate. You will need to have a 4-Way flat connector on your Accord to activate...
    view full answer...

  • Guide for Installing Trailer Wiring 4-Way on a 2012 BMW X5
  • I can show you a wiring diagram for the # 119190KIT but what I think you will find even more helpful is the install video link I attached to this page that shows this kit being installed on a 2012 BMW X5 just like yours. This will show you exactly which wires to use for the harness and how to find them.
    view full answer...

  • How to Get Blue Brake Output Wire to 7-Way on a 2015 Ford F-150 with Factory 4-Way Connector
  • On a 2015 Ford F-150 that has the factory 4-Way flat connector you can either cut the blue wire back from the brake controller and run a wire from it to the blue wire on the # 37185 adapter like you said or access the wire were it terminates further back under the truck. I recommend the second method because it is less work and you can still just plug in the brake controller using harness # 22292 (for Tekonsha controllers) or the specific harness to match the brake controller you have. Both...
    view full answer...

  • Is the 12 Volt Hot Lead Required when Installing a 7-Way Trailer Connector
  • Trailers that use 12 volt power for accessories or that have a battery will use the 12 volt circuit in a 7-Way trailer connector. If the trailer does not have those items then you would not have to make that circuit active. That means that you would not have to run any wire or install a fuse or relay associated with the 12 volt circuit.
    view full answer...

  • Recommended 4-Pole Trailer Wiring Harness for 2002 Volvo V70 XC Towing Kayak Trailer
  • The wiring in your 2002 Volvo V70 XC All Wheel Drive is not heavy enough to handle the additional power demand from trailer lights so this is why the 4-pole harnesses we offer for it, such as Curt # 56146KIT and Tow Ready # 119179KIT, use a direct battery connection to get the actual power that will operate the trailer lights. With this type of powered harness the vehicle wiring only acts like a switch to tell the converter to draw power from the battery and send it through the 4-pole connector...
    view full answer...

  • 4-Way Trailer Wiring Harness for 2000 Honda Civic EX
  • Yes the Curt Circuit Protected Converter # C56175 is compatible with your 2000 Honda Civic EX. It will also work with your boat trailer if it has a 4-way connector.
    view full answer...

  • Adding a 7-Way Trailer Connector and Brake Controller to a 2015 jeep Renegade
  • The 4- to 7-Way adapter # 37185 is not vehicle specific. Your 2015 Jeep Renegade would just have to have a 4-Way flat trailer connector already to plug into the adapter. If it doesn't then I recommend # 118651. To add the 7-Way and wire in a brake controller I actually recommend # ETBC7. This comes with the same adapter, 37185, as well as the additional wiring and other parts needed to hardwire in a brake controller. For a brake controller I recommend the P2 # 90885 because it is...
    view full answer...

  • Pod/PowerTrac Brake Controller Just Shows Red Light and Trailer Brakes Don't Work
  • It sounds like you potentially have a problem on the red wire on your brake controller. This is the wire that tells the brake controller that you are stepping on the brake pedal and also sends power through the brake switch to light up the brake lights on the vehicle (when using the manual override lever). The red wire may need to be reconnected depending on if it is hardwired in or if you used a vehicle-specific connector. It also could mean that the vehicle has a blown stop light...
    view full answer...

  • Availability of Trailer Wiring in Different Connector Formats
  • We do offer both vehicle side 7-way sockets like # 37185 and trailer side 7-way plugs like the 4-foot # H20043 which work together and which are popular in the RV market. We also offer a wide range of trailer connector adapters that allow users to join vehicles with one type of connector to a trailer that has another type. There is no type of harness or adapter offered by etrailer that has an 8-pole configuration. Flat style connectors up to 5-poles are in use, and an example of an adapter...
    view full answer...

  • Troubleshooting E1 Error Code on a Hopkins Brake Controller
  • The E1 error code indicates a trailer is not connected. If you ever get this error and the trailer IS connected a probable cause is a dirty trailer connector. Check the trailer connector on the trailer and on the vehicle. Clean out any dirt or corrosion. Corrosion can build up behind the connectors where the wires attach as well. 99% of the time this code is seen all you have to do is clean the trailer connector pins. Especially if it is intermittent like yours.
    view full answer...

  • Adapter to Convert Vehicle 4-Pole to 7-Way RV Style Wiring Connector
  • We do offer a wiring adapter that converts a vehicle's 4-pole flat type connector to a 7-way round RV style. You can use part # 37185 from Hopkins or any of the other similar adapters shown on the linked page. I recommend the Hopkins because we sell a lot of this part and it is reliable, and it costs less than many of the other options. Also, it retains a 4-pole connector too so you will have both types on the Savana. Do note that when you use this adapter for your 7-way-equipped trailer...
    view full answer...

  • Can Both Receptacles of the Hopkins Endurance Multi-Tow Trailer Connector be Used Simultaneously?
  • Yes, you can use both ports on the Hopkins Endurance # HM48470 simultaneously. You will just want to make sure that you stay within your amperage rating or else you will begin to blow fuses. I have linked the above mentioned product to this page for your purchasing convenience.
    view full answer...

  • Adding a 7-Way Trailer Connector and Brake Controller to a 2014 Nissan Frontier with a 4-Way
  • First, there are a couple of ways you can add a 7-Way trailer connector to your 2014 Nissan Frontier. You could hardwire it or you can use a plug and play 7-Way. I recommend the plug and play type, # C56226, because it costs about the same as the hardwire kit, # ETBC7, and it will be much easier to install. If you choose the hardwire kit that means you also need to hardwire in the brake controller. But if you go with the plug and play style you would just need the brake controller and...
    view full answer...

  • Determining Wire Function On Boat Trailer With No Trailer Connector
  • It sounds like someone ran the wires as what we call a wishbone. The only way to tell how the wiring is connected to the lights is to use a 12V battery and a circuit tester like part # 3808. Attach the white ground wire to the battery negative terminal and then one by one connect the other wires to the positive terminal. You can have someone watch the trailer lights while you do the testing to determine what function each wire carries. Depending on how many lights you have on the trailer...
    view full answer...

  • Brake Controller and Trailer Wiring Recommendation for a 2014 Mercedes Sprinter
  • Since you do not have any trailer wiring at all on your 2014 Mercedes Sprinter you would need to start with a 4-way. For that you would need the part # 119190KIT. I attached an install video that shows this harness being installed on a 2014 Sprinter just like yours. From there you would need to convert the 4-way to a 7-way so that you can install the brake controller. For that you will want the Brake Controller Install Kit and 7-Way Adapter part # ETBC7. I attached installation instructions...
    view full answer...

  • Can a 5th Wheel Trailer Hitch be Installed on a 2016 Ram 2500 Short Bed with Ram Box
  • In order to tow a 5th wheel trailer with a 2016 Ram 2500 that has the Ram Box feature you will need to use a Sidewinder pin box on the trailer. Sidewinders only fit in place of certain OEM pin boxes though. You can use the help article I have linked to determine if there is one for your trailer's pin box. First, for an installation kit, I recommend custom kit # C16427-204. There is less drilling required for custom kits. Then you will need a fixed 5th wheel hitch. For this application...
    view full answer...

  • Electric Trailer Jack that Plugs Into 7-Way Does Not Work when Plugged Into 2009 Dodge Ram 1500
  • First check to see if the 12 volt circuit is active on the 7-Way on your 2009 Dodge Ram 1500. Use a circuit tester such as # 3808 to test the pin in the 1 o'clock position. The truck key may have to be on. That pin should show 12 volts. If it does not then there could be a tow package fuse that is blown or missing. Use the lids on the fuse panels (under the hood and in the cab) to determine the tow package fuses to check them. If there is 12 volt power on that pin then the issue is with...
    view full answer...

  • Trailer Wiring Recommendations for a 2015 Volkswagen GTI
  • Technically, you could use Curt trailer wiring harness # 56146 on your 2015 Volkswagen GTI. But you would still need additional wiring for the power wire on the converter and a way to test the vehicle tail light wiring to determine function to make the proper connections. So you would be better off with kit # 56146KIT. Also, your GTI has what is called a pulse width modulation wiring system. That is why I recommend going with a wiring harness that is specifically designed to work with...
    view full answer...

  • Circuit Breaker and Battery Isolator for 12 Volt Trailer Connector Circuit on 2010 Ford Ranger
  • On your 2010 Ford Ranger you would attach the 12 volt power wire to the positive battery terminal via a 40 amp circuit breaker # PK54540. A wire will go from the positive terminal to the BAT post on the breaker. Then another wire will go from the AUX post of the breaker back to the 7-Way trailer connector and attach at the back in the 11 o'clock position. The circuit will be hot all the time. This is fine if nothing is drawing power from it. If you want the 12 volt circuit to only work...
    view full answer...

  • No Power to Trailer Brakes when Connected to 2003 Ford F-350
  • The blue wire on a brake controller is output to the trailer brakes. If that wire is not connected the trailer brakes will not be getting any power. If there is a break in that wire somewhere between the controller and the trailer connector then that could be why it isn't working when the wire is connected. You could bypass it by running your own wire if you wanted to. The ABS system should be separate from the wiring for the brake controller. Usually the only time the ABS comes into...
    view full answer...

  • How to Charge Trailer Battery with Tow Vehicle While Travelling
  • You would need to run a 10 gauge wire like part # 10-1-1 (sold by the foot) from the positive post of your battery to the 12 volt accessory circuit of your 7-way and then on the trailer use the same circuit to run to the positive post of your trailer battery. You should note this will only really do a maintenance charge on a full size battery. On the part # 37185 that you referenced the black wire of the adapter would be the one that would run to the battery of the Ranger.
    view full answer...

  • Uhaul Trailer Wiring Harness Causes Brake Light and Blinker to Not Work on 2009 Chevy Impala
  • The wiring harness used on your 2009 Chevy Impala must not be grounded properly or it is possible that there are bent or broken pins in the harness they used. The ground needs to be attached to clean and corrosion free bare metal surface. There can't be any paint or coating either. Check the connectors for the harness to see if there are any bent or broken pins. A bent pin might be able to be bent back but if a pin is broken the harness will need to be replaced. I recommend # 118417....
    view full answer...

  • How to Test to Identify 2006 Chevy Silverado 2500HD Vehicle Wire That Carries Dome Light Signal
  • Since auto makers are not always consistent with wire colors used in production your best option is to test the wires you have found using a circuit tester such as # 3808 or # 40376. If you can have a helper switch the dome light on and off while you test you can identify the correct wire. It is also possible to tie into the switch at the door that allows the dome light to come on when the door is opened. And a third option is if the dome light is on its own fuse you could tap in...
    view full answer...

  • Separating Out Combined Turn Signals and Brake Lights to Use Light Bars with Separate Signals/Brakes
  • Both your 1998 Chevy C/K series pickup and 2011 Ram 1500 have combined tail light wiring systems. This means the turn signals and brake lights are on the same circuits. In order to get your light bars with separate turn signals and brake lights to function you just need to separate out those circuits on the vehicle using a converter such as # C56196. I have included a link to a video review of this converter for you. If the trucks have trailer connectors you can splice into the combined...
    view full answer...

  • 50mm Ball and Converting USA 4-Way on 2012 GMC Acadia to Work with a European Trailer in Europe
  • In Europe they usually use a 50mm ball such as # EH53C-C. The wiring is a little more difficult but we can help. You can use the 4-Way wiring already on your 2012 GMC Acadia but you will need to separate out the combined turn signal and brake light circuits. For that I recommend Curt converter # C56196. Then you would just need a European vehicle side trailer connector obtained locally to match what the trailer requires. Please note that you will likely need to split the running light circuit...
    view full answer...

  • LED Trailer Lights Not Working with 2016 Tesla Model X with Tow Package
  • The issue your are experiencing is likely similar to the problems that require adapter # C57003. The LED lights do not draw enough power for the tow package to recognize that they are there. The brake magnets draw more power which is why the controller recognizes that a trailer is connected. The load resistors in the adapter will simulate increased load on the system allowing the LED trailer lights to work. LED lights do not draw much power but the range on your 2016 Telsa Model X is...
    view full answer...

  • When Should Brake Output Circuit Light on Circuit Tester part # TR20117 Activate
  • Brake controllers are designed to only put voltage on the brake output circuit when they are activated by either a brake pedal or the manual override lever of the controller. If your controller wasn't being activated the circuit on the # TR20117 won't show any voltage. Try having a friend apply the manual override of the controller while you watch the tester. You should see the light on the tester come on at that point.
    view full answer...

  • Recommended Solution for Towing European Trailer with US Vehicle
  • The best thing I can recommend you do is you would want a trailer side 7-way like part # H20042 to wire up to an EU socket found local to create an adapter to use your US spec vehicle with EU trailer wiring. I attached a chart that labels the functions of the wires on this connector for you to reference. To gain all the function that a US 7-way carries you will also need to adapt your US 4-way into a 7-way blade to be compatible with the # H20042. For this I recommend the # ETBC7,...
    view full answer...

  • How to Wire Two 6 Volt Batteries Together so that the Output is 12 Volts
  • If the batteries are wired in series, the positive terminal of one battery will be connected to the negative terminal of the other. This would double the output of the batteries, assuming each battery is a 6 volt, wiring the batteries in series would provide 12 volts of output. I attached a picture that shows the way two batteries are typically wired together.
    view full answer...

  • Parts Needed to Wire a 5-Way to a Boat Trailer
  • The best solution is going to be the part # A25W5B. What you would want to do is use the part # A25W5B to provide the wiring and connector for your trailer but then use a junction box like part # 38656 to make organizing the wiring and running each of the wires to each circuit easier. I attached an install video for this box for you to check out as well. I also attached a help article with trailer wiring diagrams as well.
    view full answer...

  • Is There Camper Shell Third Brake Wiring Available Near 7-Way of Truck
  • For a lot of trucks there is a third brake light circuit available near the trailer wiring. You would need to use a circuit tester like part # 3808 to check the voltage of both wires to see when they activate to determine what their function is.
    view full answer...

  • Troubleshooting GMC Truck Where Trailer Brake Lights Aren't Working
  • What you described sounds like a blown third brake light fuse or CHMSL fuse. Check the third brake light of your GMC Sierra and it most likely won't be lighting up with the brakes. This is a very common problem with the GM trucks of around your year.
    view full answer...

  • How to Wire Up New 4-Way to Trailer When Wire Color Functions are Unknown
  • It's interesting that your trailer connector has two green wires but aside from that standard wire colors. Typically white is ground, brown is running lights (where you would normally see 2 wires of same color), yellow is left turn/stop, and green is right turn/stop. You might try putting 12 volts via a car battery on both of the green wires to see what they illuminate. You may even try this for all of the color wires minus the white to make sure you have the functions determined. For...
    view full answer...

  • 4-Way to 7-Way Adapter Recommendation for a Trailer with 7-Way
  • Current could flow through either direction of the Pollak 7 Pole to 4 Way Connector Adapter # PK12716 that you referenced. That being said the connector would NOT match up to the 4-way on your Jetta to the 7-way on your trailer. You would need the part # 37185 instead. You will notice that this adapter has a socket instead of a male 7-way. This would be the configuration that would work for your application.
    view full answer...

  • 7-Way Recommendation Extension for Towing Camper that Wants to Unplug 7-Way
  • To extend your 7-way the part # 20027 would give you 7 additional feet of 7-way wiring. Since you said camper I am thinking you may have a fifth wheel camper and are using the 7-way at the bumper of the truck. If that is the case your best solution would actually be the part # 41157. This installs inline with the 7-way at the rear of the truck and then allows you to install a second 7-way up in the bed of truck.
    view full answer...

  • 2015 GMC 2500 Sierra Brake Controller and Install Harness Recommendation
  • Your 2015 GMC Sierra 2500 came pre-wired for a brake controller. All you would need is the correct install harness for the truck. If you went with a Tekonsha brake controller like our best selling P2 part # 90885 all you would need is the install harness part # 3016. For a brake controller I would recommend the Prodigy P2 Brake Controller part # 90885. This is our best selling brake controller because of how well it works and how easy it is to setup. This is a proportional brake controller...
    view full answer...

  • Tow Ready Trailer Wiring Harness Recommendation for a 2004 Volkswagen Jetta
  • The trailer wiring harness part # 119178 that you referenced is a confirmed fit for your 2004 Volkswagen Jetta but you would actually want the part # 119178KIT instead as it comes with a circuit tester and some quick splices to make the needed connections. If you happen to already have those parts then all you would need is the # 119178.
    view full answer...

  • Fifth Wheel 7-Way Recommendation for the Bed of a 2012 Ford F-Super Duty
  • What you would want is the part # 41157. This plugs in line with the 7-way at the rear of your 2012 Ford F-250 and then allows you to route the additional 7-way up to the rear wheel well so that it can be mounted for easy access for the fifth wheel. I attached an install video for you to check out as well.
    view full answer...

  • Troubleshooting Trailer Running Lamp Circuit
  • The first thing I'd do is check the running lamp pin on the 7-way on the vehicle. When you're looking at the connector the pin for the running light circuit would be in the 11:00 position on the connector. With the truck's headlights on, use a circuit tester like part # 40376 to test that pin. If there's power on the pin, the problem is in the running light circuit on the trailer. If there is no power on the pin, the problem exists on the vehicle. If the problem's on the vehicle, how...
    view full answer...

  • Could Fifth Wire of Trailer 5-Way be Used for Brake Output for Brake Controller
  • If you wanted to move the fifth circuit of your 5-way from being a reverse light circuit to a brake light circuit you certainly could. You would just need to remove it from the reverse light circuit and then wire it up to the front of the vehicle and attach it to the blue wire of your brake controller. Then the 5th circuit of your trailer's 5-way would need to get ran to the brake light.
    view full answer...

  • Where Does Red Wire of Curt Trailer Wiring Harness # C59236 Wire
  • The red wire of the # C59236 would need to run to the stoplight circuit of your vehicle if it has separate turn and brake lights. Or if they are combined on the same circuit it would just get grounded. You may need a circuit tester like the part # 3808 to find the stop light circuit.
    view full answer...

  • Is it Okay to Install Fuse and Relay to Activate 12 Volt Accessory Circuit on 2015 Ford F-150
  • You are absolutely on the right track. Sometimes vehicles don't have the 12 volt circuit active on the 7-way since not every trailer needs this circuit. Typically GM trucks though. All you need to do is install the missing fuse and relay and you would be good to go.
    view full answer...

  • Tapping Into Brake Switch for a Brake Controller on a 2009 Chevy Silverado 3500 with Dump Body
  • The 2009 Chevy Silverado 3500 has tow package wiring for a brake controller up under the dash. The red brake controller wire is the one associated with the brake pedal. If that connection is loose or the fuse for it has blown then that would be why the controller is not working when you step on the brake pedal. If you choose to tap into the brake switch then look for the wire that is light blue with a white stripe. The ignition will need to be turned on to see power on this wire. Use...
    view full answer...

  • LED Trailer Wiring Set Recommendation for Replacing Lights with 3 Wires
  • The Miro-Flex LED Tail Light Set # TLL28RK would be a great choice for you as they are an LED trailer taillight set that uses three wires. The white is ground, the brown is taillight, and the yellow is for left stop/turn and the green right stop/turn. I attached an install video for these lights for you to check out as well.
    view full answer...

  • 4-Way Trailer Wiring Harness Recommendation for a 2006 Saturn Vue
  • Since your 2006 Saturn Vue has separate turn signal circuits from the brake lights you would not be able to hardwire a 4-way directly to the taillights like with the part # 18004 that you referenced. Instead you would need a harness that has a converter built into it so that the circuits are adapted to what a 4-way requires. For that we have the part # 118418 which is a confirmed fit and would work well. This plugs in line with your vehicle taillight harnesses and does not require...
    view full answer...

  • Troubleshooting Brake Controller that Stopped working with Brake Pedal on Chevy Silverado
  • The problem is the red wire of your brake controller. It isn't connected to a circuit that sees 12 volts of power when the brakes are applied. Since your truck is a 2009 Chevy Silverado this would mean that the problem is most likely a blown third brake light (CHMSL) fuse. An easy way to test this theory is to check to see if your third brake light is working. If it's not the fuse is the problem.
    view full answer...

  • Could Trailer 7-Way 12 Volt Accessory Circuit Charge Boat's Battery
  • The 12 volt accessory circuit of a trailer 7-way connector is commonly used to put a maintenance charge on trailer batteries. There really is no reason you couldn't run the wire up to the battery of your boat instead. If the battery is smaller in size it might actually put a decent charge on it too. The big thing will be to come up with a way to disconnect the charge wire from the boat before backing it into the water.
    view full answer...

  • 7-Way Plug and Lead Recommendation for a Trailer that has a 5-Way Installed on It
  • So you have a tow vehicle that has a 7-way connector on it and then a trailer that has a 5-way? What you would need to do is remove the 5-way wiring and install a 7-way with a lead like part # HM20048 which is a 7-way with 11 feet of harness. I attached a picture that has a diagram that has how a 7-way normally wires to a trailer.
    view full answer...

  • Are Connectors On Either End of 50-67-210 Identical or a Mirror Image of Each Other
  • The contacts one each end of the Bargman # 50-67-210 are exactly the same. This item is intended to be used if your trailer connector would not be able to reach your tow vehicle. You can plug in one end on your trailer and plug the other end into your tow vehicle.
    view full answer...

  • How to Locate Stoplight Circuit for Installing Brake Controller in a 2014 Toyota Sienna
  • You will need to use a circuit tester like part # 3808 to test all of the wires leading to the brake pedal switch until you find the one that carries 12 volts only when the brakes are applied and none when released. I attached an install video for a brake controller on an older 2005 Toyota Sienna to show you what the process is like.
    view full answer...

  • Troubleshooting No Brake Lights on Trailer when Towing with a Motorhome
  • It sounds like you have separate tail lights on your motor home. Meaning that the stop/tail lights are not on the same bulb as the turn signals, and that your current trailer wiring is set up for combined tail light wiring. We have a converter that will need to install onto the wiring of your motorhome so that the signal will be split appropriately. You would want a Vehicle to Vehicle Taillight Converter # 118158. To wire it in you will need to take the right turn/stop circuit and...
    view full answer...

  • Is Using a Brake Controller Necessary for Towing a Trailer
  • If the trailer is equipped with electric brakes and you want them to actuate, you'll need a brake controller. A brake controller is a fairly small investment that will go a long way to keep you safer when towing. There are two types of controllers, the older time-delayed variety and the newer proportional type. I'd recommend going with a proportional controller like the Tekonsha Primus, part # TK90160. A proportional controller can sense how quickly the tow vehicle is braking, and...
    view full answer...

  • Trailer Right Blinker and Brake Light Not Working when Connected to a 2015 Ram 2500
  • The issue you are describing sounds like a ground issue. Ground problems normally show up when there is more draw on a system such as when you have the running lights on and then use another function like a turn signal or brake light but can show up any time. Make sure that the vehicle side and trailer side connectors are clean and free of corrosion inside and out. The main connector grounds should be attached to clean and corrosion free bare metal surfaces. The light grounds should...
    view full answer...

  • Trailer Brakes Don't Work w/2008 Silverado but Other Trailers Work and Other Trucks Work w/Trailer
  • It sounds like there is a short somewhere because you should not be getting fluctuating voltage readings. Usually this is caused by a dirty/corroded trailer connector and/or a loose wire. Make sure the truck and trailer side connectors are clean and free of corrosion inside where the wires attach and outside on the pins. While inside the connectors you can check for loose connections. Every vehicle's tow package wiring is different and sometimes a trailer function will work with one...
    view full answer...

  • Troubleshooting 6-Way Trailer Wiring Where Trailer Brakes Lock Up when Trailer is Plugged in
  • For your trailer with a 6-way there are actually two common ways the 6-ways can get wired up. The only difference is that the brake output circuit and the 12 volt circuit are swapped. Since your brakes are locked up currently all you need to do is swap those two circuits and the wiring should be correct. What that means is swap the circuit in the 2:00 and center position. That will fix your problem. We see this issue pretty regularly and the solution is always just swapping the two circuits....
    view full answer...

  • Adding 4-Pole Flat Trailer Connector to Motorhome
  • We don't offer a plug and play type adapter that would do this, but you could add a 4-pole flat connector using # 18002. You'd simply tap the 18002 into the wiring feeding the existing 4-pole. Instead of the quick-connectors, I'd recommend using butt connectors like # DW05744-10 instead, this would make for a more secure connection. The 18002 would wire to the existing wiring feeding the round 4-pole connector color for color.
    view full answer...

  • Availability of 6-Way/4-Pole Trailer Connector
  • I don't have a plug-in adapter available, but I do have some solutions that would provide you with a functional 6-way and a 4-pole. Option one would involve removing your existing 6-way and installing part # 37175. Cut the 4-pole plug off the 37175 and wire it as follows: Blue - for electric brakes Red - for auxiliary or hot lead White - for the ground Yellow - left turn/brake lamp Green - right turn/brake lamp Brown - running lamp Or, you can completely remove your existing...
    view full answer...

  • Running Lights Will Not Work on a Big Tex Gooseneck Trailer
  • The first thing we need to figure out is if the problem exists on the truck or trailer. To do this you will need a circuit tester such as # 3808 or a meter if you have one. Disconnect the trailer from the truck and have someone sit in the truck to operate the running lights while you test the connector at the back of the truck. The running light circuit should be the pin in the 1 o'clock position on a vehicle side 7-Way connector. If there is power on that pin then the issue is on the...
    view full answer...

  • How to Make 7-Way to 6-Way Square Adapter for Jayco Camper
  • To make a 7-way to 6-way square adapter will require you to get the part # 37995 to use the 6-way end and then wire up a 7-way to it like part # H20043. This will give you the adapter you would need since there isn't one already pre-made.
    view full answer...

  • Recommended Wiring Upgrading from 4-Way 119178kit to 7-Way for Bypassing 2006 Dodge Ram Pickup TIPM
  • You are correct, you will need the # ETBC7 kit to upgrade your 4-way to a 7-way for your 2006 Dodge Ram 2500. We actually have a specific FAQ for your vehicle to install a brake controller, see attached, you'll want to go to starting from scratch after step 2. For a brake box, also known as a brake controller, the Primus IQ proportional brake controller # TK90160 (1 to 3 axle trailers) is growing to a customer favorite. I have linked an installation video of this brake controller for...
    view full answer...

  • Only Running Lights are Working on Trailer with Multi-Tow Adapter
  • To find the solution to your problem you may need to check a few things. Your 2013 Nissan Armada needs to have two relays for your left and right turn signals and brake lights # C57000 in order for them to work so you will need to check these. There's a video attached of the Trailer Wiring Harness Installation - 2010 Nissan Titan. If you watch this video and skip forward to 1:17 it will show you the relays and where they are. If you do not have them you will need to get some. If...
    view full answer...

  • Would the 4 and 5-Way Pins of the # 37385 Both Be Active at the Same Time
  • Yes, the 4-way and 5-way pins of the part # 37385 will both be active when the adapter is plugged into a 7-way. You could use both at the same time.
    view full answer...

  • Trailer Brake Lights Not Working on a 1999 Chevy Silverado 2500
  • It could just be a fuse on your 1999 Chevy 2500. Check the owner's manual and fuse panel lids to see if there is a separate fuse for trailer brake lights. It could also be a stop light or CHMSL fuse that is blown. If Your 1999 Chevy is an actual Silverado and not a C/K series with the Silverado trim then it will have separate turn signal circuits from the brake lights (1999 was a slit year so there were both C/K series and Silverados which is the name Chevy started using for their trucks...
    view full answer...

  • How to Install Curt Trailer Wiring Harness in 2015 Lincoln MKT
  • To install the Curt 4-pole wiring harness installation kit # 56146KIT that fits your 2015 Lincoln MKT you will access the vehicle wiring behind the two taillight assemblies. The pigtail wire leads that exit the converter box's left side attach to your car's stop, turn and running light wires using the included quick-splice connectors. You will also make a ground and 12V+ power connection. I have linked an installation video showing this kit installed in an earlier model year Lincoln...
    view full answer...

  • Recommended 7-Way to 5-Way or 4-Way Flat Adapter That Measures 3-Ft Long
  • For a 7-Way to 5-Way or 4-Way Flat connector I recommend part # HM47075. This adapter will work with a 4-way or a 5-way and has Nite-Glow which lets you know you are connected and working. This has a coiled cable which measures 3-ft when stretched.
    view full answer...

  • Does the Prodigy RF Brake Controller Need Brake Output and Reverse Lights Circuits to Work
  • Since you are using the Prodigy RF brake controller # 90250 you will only need to have the 4-Way plugged into the adapter, the white wire grounds to the vehicle frame, and the black wire needs to have power because that is where the RF gets its power. The blue and yellow wires on the adapter, # C57674, will not be used for the RF. But if your trailer has an electric reverse lock out then you would have to attach the yellow wire to a reverse light wire on the vehicle The black wire...
    view full answer...

  • 7-Way Wiring Harness for 2008 Ford F-150
  • The 7-way wiring harness kits offered for your 2008 Ford F-150 are shown on the linked page and all include both the wiring harness portion and the trailer connector as well, such as PK11893-11932 from Pollak and Tow Ready # 20119. Both of these use a standard round U.S. Car connector. The part you referenced, # 118247, uses two OEM connectors and is a fit for 2004 model year trucks but not for your 2008 F-150.
    view full answer...

  • Replacement 7-Way Trailer Connector and Wiring Pigtail for 2013 Ford F150
  • I'm not sure what you mean by harness clips, but the # HM40975 will work as a replacement for the existing 7-way on your 2013 Ford F150. If the US car connector that plugged into the back of your existing 7-way has been damaged, then you can cut off the existing US car connector and wire on the # PK11998 pigtail. The pigtail wires are color coded as follows: Red - Left Turn and Stop - 14 gauge White - Ground - 10 gauge Blue - Electric Brakes - 12 gauge Green - Right Turn and Stop...
    view full answer...

  • Parts Needed to Install a Brake Controller in a 1999 Dodge Ram
  • For your 1999 Dodge Ram 1500 that does not have any trailer wiring at all you would first want to start with the part # 118329 as it is a 4-way like what you referenced but it is a custom fit harness designed to specifically work on your vehicle. The one you mentioned is a universal kit that could work but would be much more difficult to install. From there you would need to convert the 4-way to a 7-way so that you can install the brake controller. For that you will want the Brake Controller...
    view full answer...







Stay Connected


Subscribe to email newsletter

Email  

privacy - we don't send unsolicited email






etrailer.com reviews etrailer.com reviews

All images, layout and content copyright etrailer.com