summer hauling headquarters
Filter Results

Filter Questions and Answers:

reset filter

Expert Answers about Wiring


  • Troubleshooting Trailer Running Lights Not Functioning on 2013 Nissan Xterra Wiring
  • The one missing running light relay is a common issue on certain Nissan vehicles. It is usually a missing relay in the in-cab fuse panel and it is # 38666-1 but you can check the owner's manual for all fuse and relay locations to verify. The relay is attached to a wiring harness which is located behind the passenger side kick panel near the passenger door (see picture).
    view full answer...

  • Troubleshooting Trailer Taillights that Stop Working When Brakes or Running Lights Come On
  • Try improving the connection of the main ground wire of the trailer wiring harness. Make sure it is attached to a clean metal surface. Or you can run all of the trailer wires back to the main ground. This is actually the ideal solution. But you can also check the current grounds for the lights to make sure they are making a solid connection to a clean metal surface. What you described is the classic insufficient ground scenario so finding a way to improve the grounds will fix the problem.
    view full answer...

  • Is Powered Converter Needed for Proper Operation of 4-Way Connector on 2013 Toyota Highlander
  • If your 2013 Toyota Highlander is not equipped with the factory tow package (which includes the converter under the dash), then you do indeed need a powered converter like what is included with the Curt T-Connector Harness # C56217. You are correct that the converter safeguards the vehicle's wiring but it also is needed to provide enough power for the trailer lights. The factory wiring on the Highlander simply isn't heavy enough to handle the type of current needed to power trailer lights...
    view full answer...

  • Running Lights Are Dim, But Why?
  • In many cases a bad ground is to blame for this type of issue so you are going to want to start by taking a look at are the ground connections. Make sure your grounds are securely attached to bare metal surfaces free of any paint, dirt or corrosion of any kind. Also check your wiring thoroughly to ensure there are none that are crimped, broken or otherwise damaged. It is also possible you have too many running lights and that is causing an overload on the system, particularly if you...
    view full answer...

  • How to Hook Up a 7-Way Trailer Connector When Towing a Trailer Without Brakes
  • In order to install a 7-way trailer connector on your 2003 Acura MDX, I recommend using the Adapter 4-Pole to 7-Pole and 4-Pole part # 37185 which has both 4 and 7-way trailer connection points, not the Universal Brake Controller Install Kit part # ETBC7. The reason being that part # ETBC7 comes with a bunch of unneeded wires and circuits breakers which are specific for trailers with brakes. The only thing you need to do to install the 4 to 7-way adapter on your MDX is plug the 4-way's...
    view full answer...

  • Troubleshooting Trailer Wiring on RV not Functioning
  • 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...

  • Should the Wire Just Before the Braking Assemblies Receive 12 Volts
  • It is normal for the brake output wire to lose voltage as it travels from the brake controller to each braking assembly. The amount of drop should only be around 1-2 volts so if it is more than this then there is an interruption in the wire that would need to be either repaired or replaced. You can use your multimeter to find where the loss (if any) occurs. With that being said, if the brake controller is not at the max settings and you are not using the manual override then it would...
    view full answer...

  • Installing 7 Blade Trailer Side Connector
  • The Hopkins 7-Way RV Style Trailer Connector with Nite-Glow - Trailer End # HM48502 will connect to your trailer wiring based on the function and pin locations of the attached photo. I've also attached an article to further assist with the trailer wiring.
    view full answer...

  • Where Do Vehicle and Trailer Wiring Harness Ground Wires Connect
  • The ground wire on a trailer's wiring harness (usually a white wire) should be firmly attached to clean bare metal on the trailer frame. The white ground wire on the vehicle's wiring harness should similarly be attached to clean bare metal on the vehicle, or to an existing factory grounding point, or even directly to the battery negative terminal. When the trailer and vehicle are connected together through their 4-pole wiring the trailer will ultimately be grounded to the vehicle battery. Bad...
    view full answer...

  • Manual Override Will Not Work Twice in a Row with an EOH Actuator
  • The issue you are experiencing with your trailer brakes could be attributed to either a fault in the brake controller wiring or a fault in the electric over hydraulic actuator wiring. I recommend starting with the brake controller wiring. In order to test this you will need to use a multimeter like part # ALL648349. Once you obtain the multimeter I recommend turning the settings on the brake controller up to their max output. You can then have someone engage the manual override while you...
    view full answer...

  • Troubleshooting Reason for Wire Ran to Brake Switch Circuit on 1994 Chevy Silverado 1500
  • Most likely that red wire from the brake switch was ran to a brake controller. Typically when installing a brake controller you end up tapping into the stoplight circuit switch so that the controller knows when the vehicle brakes are getting applied. Was there a brake controller installed that maybe got stolen?
    view full answer...

  • Will Trailer Battery Drain Vehicle Battery if Trailer Wiring is Left Connected
  • When you are camping I would recommend disconnecting your trailer wiring from your tow vehicle so that as the trailer battery gets discharged it does not drain the vehicle battery too. Having them connected will allow the trailer battery to last much longer but at the cost of potentially leaving you stranded! We do have a vehicle jump starter though that can help start a vehicle with a dead battery. For that check out the Peak Jump Starter part # PKC0J7.
    view full answer...

  • Installing Hopkins 4-Way to 7-Way Trailer Adapter for Just 4-Way Functions
  • When using a trailer connecter like the Hopkins Endurance Multi-Tow 4-Way Flat to 7-Way RV Trailer Adapter w/ 4-Way Vehicle End Plug # HM47180 you will need to ground the white wire to your vehicle to make sure the trailer connector works correctly. You want to attach that ring terminal to a bare metal connection on your frame. This will allow your 4-way functions to transfer to the 7-way blades correctly.
    view full answer...

  • How to Wire Pollak 6-Pole Round Pin Trailer Connector # PK11604
  • The inside terminals on the Pollak 6-Pole Round Pin Trailer Connector # PK11604 referenced in your question are labeled on the inside edge of the plastic with letters that identify their functions. The letters are as follows: G - Ground T - Running Lights L - Left Turn R - Right Turn S- Brakes/12V Power A - Brakes/ 12V Power You will want to test the wires on your trailer for function to ensure you make the right connections. Strictly going by wire color isn't always the best...
    view full answer...

  • Towing Capacity of a 2012 Ram 2500 Crew Cab Big Horn Short Bed
  • According to the 2012 Ram towing guide the 2012 Ram 2500 Crew Cab, Short bed, "Horn" editions with 2-wheel drive have a max trailer towing capacity of 9,850 pounds. Models with 4-wheel drive have a max trailer towing capacity of 9,450 pounds.
    view full answer...

  • How to Manually Operate a Slide-Out in a Fleetwood RV or Trailer with Power Gear Motor
  • The first thing you will need to do is locate the slide-out relay control and unplug the wiring harness from the controller. Then find the slide-out motor. On the back side of the motor there should be a brake lever. Turn it counter-clockwise to the release position. The room will now be able to move. In order to move it in or out use an adjustable wrench on the drive shaft cross tube to crank the room in or out as needed. Re-engage the brake lever after moving the room in or out. If...
    view full answer...

  • Can 7-Way and 4-Way of Hopkins Endurance Trailer Connector # HM48470 be Used at Same Time
  • Yes, both the 7-way and the 4-way of the Hopkins Endurance Multi-Tow 7-, 5- and 4-Way Flat Trailer Connector # HM48470 that you referenced are active at the same time. You could use the 7-way for towing and the 4-way for a light bar if needed.
    view full answer...

  • Troubleshooting No Braking Power from Foot Brake to Trailer Brakes on 2015 GMC 2500
  • I recommend using a circuit tester like # 3808 to check the red wire on your brake controller to ensure you are getting power from your brake light switch to your controller. If you are getting power, then you will want to check the adjustment settings on your controller. If you are testing your controller when your vehicle is stopped, you will not get a reading from the brake pedal because it is a proportional controller and no trailer braking is needed if you are not moving. The manual...
    view full answer...

  • Length of Replacement 7-Wire to 6-Wire Coiled-to-Straight Cord
  • The Replacement 7-Wire to 6-Wire Coiled-to-Straight Cord for Roadmaster Nighthawk Tow Bar # RM-1676-7 measures a total of 8' long. When extra length is needed and it uncoils it won't cut the wiring. The electrical cord is designed to protect the wiring and isn't going to uncoil and somehow damage it.
    view full answer...

  • How to Remove & Replace Factory Twist-In 7-Way Trailer Connector on 1999 and Newer Chevy/GMC Trucks
  • Take a look at the video I have linked that shows installation of 7-Way trailer connector # PK11916. In this video it shows not only what the twist-in connector looks like but also how to remove it in order to replace it. If this is the type of factory 7-Way you have then # PK11916 will fit in place of the factory 7-Way.
    view full answer...

  • Troubleshooting Trailer Tail Light Functions and 2016 Ram 1500
  • It sounds like you need to test your trailer connectors. I recommend first using a circuit tester like # 3808 to test the pins at the 3 o'clock and 9 o'clock positions. The 3 o'clock position is the right turn and brake pin and the 9 o'clock is the same for the left side that you stated is working. If the 3 o'clock pin works using the tester, then your trailer wiring is the next step. If it is not working first check the F81 fuse. If the fuse is good then you will need to use the circuit...
    view full answer...

  • Troubleshooting Brake Controller Output Function
  • It sounds like your Tekonsha brake controller is either not working properly or you have a short in your brake output wire. I recommend using a circuit tester like # 3808 to test the red wire when you hit your brake pedal. This will determine if you are getting the brake switch signal or not for the indicator light on your controller. Because you are not getting the correct voltage when using the manual override slide, I recommend cutting the blue wire about 6 inches from the back...
    view full answer...

  • What is the Towing Capacity of a 2012 Ram 2500 6.7 Liter and 3.42 Rear End Gear Ratio
  • According to the owner's manual for the 2012 Ram 2500 with the 6.7 liter motor: ST, SLT, Bighorn/Lonestar, Laramie, Outdoorsman models with manual transmission can tow a maximum of 13,350 pounds. Models with the automatic transmission can tow up to 15,450 pounds. However, it is a little more complex than the manual shows. Other factors that will affect the capacity of the truck are the cab style, bed length, and if it is 2- or 4-wheel drive. It appears that the maximum can only...
    view full answer...

  • Fuse Location for Trailer Tow Battery Charge on 2003 Ford F-350
  • I looked in the owner's manual of your 2003 Ford F-350 and found that the trailer tow battery charge was in fuse location 115 and it was a 20 amp maxi fuse.
    view full answer...

  • All Trailer Lights Blink with Turn Signals Engaged
  • The issue you described sounds like a ground problem as is the case for most sporadic lighting functions. In order to fix this you will first want to start with the lighting assemblies. They will either ground through a single wire or the mounting hardware. Regardless, you will want to remove either and sand down the surface before attaching. Once this is done you will then need to do the same with the trailer connectors for both the vehicle side and trailer side. Repeat the above process...
    view full answer...

  • Connecting 2 Batteries in Parallel with an Inverter to Power a Freezer in Back of a 2015 Ram 1500
  • Running 2 identical 12 volt batteries in parallel will produce 12 volts but double the amp hour capacity. Assuming your inverter runs off of 12 volt power then you will be good to go with this set up. Since the 2 batteries will be separate from the truck's electrical system you won't have to worry about any interference or over drawing the tow package wiring on your 2015 Ram 1500. If you do not already have an inverter I recommend # WC3720 which is rated at 1000 watts and the AC outlets...
    view full answer...

  • Adding a 7-Way Trailer Connector to a 212 Subaru Outback and How to Charge Trailer Battery
  • I do have a video that will be very helpful when installing a 7-Way connector on your 2012 Subaru Outback. I have linked that video for you. But not all parts of the video will apply to your situation simply because of the type of brake controller you are using. So you can just ignore those parts. You will need # ETBC7 which comes with the 7-Way and the wiring and other accessories you will need. The installation is not difficult and if you have even a little experience with automotive...
    view full answer...

  • Troubleshooting Trailer Lighting When Connected to 2008 Dodge Ram 7-Way Trailer Connector
  • The first thing you will want to do is check the trailer connector pins individually for function. I recommend using an incandescent circuit tester like # 3808 to test for power. Since you don't have brakes on your trailer, you don't need to be concerned about that feature for this application. If you have a 7 way on your trailer currently and your vehicle side connector tests as working, I recommend next checking your ground connection on your trailer. You want to make sure it is free...
    view full answer...

  • Troubleshooting Trailer Wiring Circuits Not Working on 2015 Chevy Silverado
  • First thing you should do at this point is test the 7-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...

  • How to Install a Brake Controller and 7-Way on a 2015 Ford F-150 with a Factory 4-Way
  • If the 4-Way connector on your 2015 Ford F-150 is from the factory and not an aftermarket add-on then the plug for the brake controller will still be present and it will be semi-functional. What you will need to complete the installation is # ETBC7 along with the brake controller and vehicle-specific wiring harness to plug the controller in. This installation is a hybrid meaning it is part plug and play and part hardwire. I will explain how it will all install. But first for a brake...
    view full answer...

  • Troubleshooting Trailer Wiring Function with Vehicle
  • Without knowing your vehicle, let's start with the basics. You will want to use a circuit tester like # 3808 to test each function of your trailer connector when your trailer isn't connected. If all the functions work, then you will want to connect your trailer and test each function. If you are just missing the function on your right side tail light, then you will want to first check the ground connection on that tail light which at times has a separate ground wire but most of the time...
    view full answer...

  • Replacement for Pollok PA66-MD40 on 2012 MB Sprinter Pleasure-Way
  • If you already have the Pollak PA66-MD40 you referenced, then the # PK11893-11933 is the correct replacement part. If you meant you also have a 6-way square plug on the trailer and the 7-way on your vehicle, I recommend the 7-way to 4-way adapter like # TR20141 and then using the Adapter 4 Way Flat to 6 Way Square for Jayco # 30104.
    view full answer...

  • Troubleshooting Trailer Wiring Short On 2003 Chevy Tahoe
  • You should definitely not have a ground on the left and right turn and stop functions. When testing your connector, use a circuit tester like # 3808 and connect the alligator clip to a frame bolt. Then test each pin for function. If you find you are not getting the functions, you will want to check your fuses and replace them. If you have a short behind the trailer connection, check for exposed wire through insulation and you can use the circuit tester to probe through the insulation...
    view full answer...

  • Does the 12 Volt Power Wire Need to Be Ran on a 7-Way Trailer Connector
  • The 12 volt wire on a 7-way trailer connector like the Adapter 4 Pole to 7 Pole and 4 Pole part # C57674 is more often than not used to charge a battery on the trailer such as the ones used in a breakaway system. If there are no 12 volt accessories on the trailer then there is no need to run the additional wire. It really doesn't have anything to do with the tow vehicle. If your trailer has brakes then instead of the above adapter I recommend using the Universal Installation Kit part...
    view full answer...

  • Installing Trailer Plug for Correct Wiring Location for Trailer Functions
  • Rewiring the Pollak Heavy-Duty, 7-Pole, Round Pin, Trailer Wiring Connector - Trailer End # PK11700 simply means disassembling it. The outer housing has a screw to release the connector and give you access to the screws for each wire. You will simply loosen the screws as much as possible and slowly and firmly pull the wire with a pliers. I've attached an article to assist with the correct locations for the rewire.
    view full answer...

  • Recommended Butt Connectors to Use with Wesbar 4-Flat Connector # W002230
  • The Wesbar 4-Flat Connector Wishbone Style # W002230 referenced in your question features 18 gauge wire (and 16 gauge for the ground wire). With this in mind the Deka Butt Connectors # 05730-5 that you also mentioned will work great, as it is designed for 22 to 18 gauge wire. It includes 5 connectors. For a more secure and durable connection you might also consider heat shrink butt connectors like # DW05743-5 instead. These will also work with the Wesbar harness and includes 5 connectors.
    view full answer...

  • Is Center Pin on Pollak Heavy-Duty 7-Pole Connector # PK11700 Required for ABS Brakes
  • If you have a commercial trailer with air brakes and it doesn't have an onboard ABS system then the 7th/center pin on the Pollak 7-Pole Round Pin Connector # PK11700 would need to be active. It really just depends on your trailer's particular setup. Otherwise the center pin can simply be used for auxiliary function or not used at all. I have attached a short video demonstration on this connector that you can also check out.
    view full answer...

  • Activating Electric Trailer Brakes on Trailer Towed by a 2010 Ford F-150
  • It sounds like the brake magnets are using the main trailer connector ground on the trailer which would be why the wiring goes back to the front of the trailer after tying into the second hub. But only the ground wires should be going back to the front of the trailer. If the power wires are also going back to the front then there the circuit is not being completed properly and the brakes won't work. You mentioned that you have a 4-pole. You are going to need a 7-Way connector on the...
    view full answer...

  • How to Wire 2 New Batteries to a 1993 Holiday Rambler 5th Wheel Trailer
  • It depends on how you want to connect the batteries; in series or in parallel. Batteries that are wired in series will double the output voltage and keeps capacity the same. So for example if you are using 2 identical 12 volt batteries connected in series the output voltage would be 24 volts and the amp hour rating would be whatever it says on one of the batteries. If the same 2 batteries were connected in parallel they would be putting out 12 volts but the capacity would be doubled....
    view full answer...

  • How to Attach a Toad with a 4-Way to a Motorhome with a 7-Way
  • The Blue Ox EZ Light Wiring Harness part BX88314 has a male 4-way trailer connector. The Mighty Cord Trailer Connector Adapter part # A10-6034VP and the Tow Ready Trailer Connector Adapter part # 30637 also both have male 4-way trailer connectors so they will not plug directly into each other. The best option for you is to use the RoadMaster 7-Wire to 6-Wire Flexo-Coil Kit part # RM-146-7 or the RoadMaster 6-Wire Trailer Connector part # RM-910030-7 if you already have the adapter. You...
    view full answer...

  • Can a 20 Amp Motorized Lift be Tied into the 12 Volt Circuit on a 2018 GMC Sierra 1500 7-Way Plug
  • The 12 volt circuit on your 2018 GMC Sierra 1500 is rated for 30 amps. You can confirm this by looking at fuse location 2 in the fuse panel under the hood. Assuming that you are not also teeing something else in that is drawing power from the 12 volt circuit at the same time you are using the lift then there won't be a problem. Otherwise it would blow the hot lead tow package fuse on the truck.
    view full answer...

  • Installation of Brake Controller on 2016 Ford Explorer
  • To install a brake controller on your 2016 Ford Explorer, if you have the factory 4-flat you will need to hardwire the rest in. I am not certain which brake controller you have specifically but the black wire is generally the power wire and run to the positive post of your battery through a 20- or 30-amp circuit breaker, and you also want to connect the blue wire coming out of the brake controller to the brake wire and the red wire from your controller will be what you connect to the wire...
    view full answer...

  • Troubleshooting Trailer Turn Signals Malfunctioning with 2007 GMC Acadia with 4-Pole Wiring
  • The problem you describe, both trailer turn signals activating when either turn signal on the Acadia is engaged, is typically a grounding issue. Since you have already re-worked both the vehicle and trailer main grounds to ensure both are solidly connected to clean bare metal surfaces, then the most likely cause for the problem is either a bad wiring harness on the Acadia or some issue with your adapter. I could not find purchase history to let me see the specific wiring harness and...
    view full answer...

  • Recommended 4-Way Trailer Wiring with 5 Wires
  • For your 4 way Flat connector on your trailer, I recommend the Hopkins Endurance Quick-Fix Replacement 4-Way Flat Trailer Connector w LED Test Lights - Trailer End # HM48192. Your description talls me you have a wishbone wiring on your trailer which has two running light wires (one to each side of the trailer) so that a jump wire from one side to the other is not needed across your trailer frame. The two brown wires (running lights) will connect next to the white ground. Then you will...
    view full answer...

  • Compatibility of 7-way to 5 or 4-way Trailer Connector with Integrated Resistors for Boat Trailer
  • The 7-Way to 5-Way/4-Way Trailer Adapter for Vehicles with Lamp-Out Sensors Towing Trailers with LEDs # TR20141 will work with your 2008 Chevy Avalanche. This adapter has load resistors to correct any lamp out errors from LED lights not pulling enough power to let the system know that incandescent bulbs are not burned out.
    view full answer...

  • Troubleshooting Camper With Running and Tail Lights Not Working
  • If your trailer's running lights and tail lights are not working you will need to do some troubleshooting to determine the specific problem. Use a circuit tester such as # 3808 to test the connector on your vehicle after disconnecting it from your trailer. Check the wiring going into your harness from your tail lights to see if those wires are carrying the correct signals, if not then the issue is with the vehicle wiring. If the signals going to your harness are okay, you'll need to test...
    view full answer...

  • Activating 12 Volt Power Circuit of 7-Way at Rear of 2016 Chevy 2500HD
  • There's a connection you still need to make under the hood of your 2016 Chevy Silverado 2500 to complete the 12 volt power circuit of the 7-way at the rear of your truck. If you check out the picture I attached you'll see what connection I am referring to.
    view full answer...

  • Can the Curt Adapter # C57300 be Used to Upgrade 7-Way to Combo Connector on a 2007.5 Ram Pickup
  • Yes, you can use the Curt Dodge OEM Harness Adapter # C57300 to install a 7-Way/4-Way connector like part # HM40975 or # 30955 on your 2007 Dodge Ram Pickup. A more cost-effective option though would be to install the Hopkins # 42145 which comes with the 7-Way/4-Way connector and installs directly into your OEM connector.
    view full answer...

  • Troubleshooting Hayes Brake Controller that Works Intermittently
  • Hayes brake controllers aren't known for their reliability. What you described sounds like an internal problem. You can try unplugging the controller for several seconds and then replugging it back in to reset it but most likely you'll need to replace it. For a brake controller I would recommend the Prodigy P3 Brake Controller part # 90195. 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 that...
    view full answer...

  • How to Determine Correct Wires for Trailer Light Wiring on a 2014 Land Rover LR4
  • The typical layout of wiring is as follows: Green - Right Turn/Stop Yellow - Left Turn/Stop White - Ground Brown - Tail/Running Blue - Brake Controller Output Red or Black - 12V Power Purple - Reverse Since each vehicle is different and manufacturers haven't decided on a universal system it is better for you to verify the different wire functions with a circuit tester like part # 3808. I am attaching some pictures to demonstrate where each function is connected to for both the...
    view full answer...

  • How to Determine if Battery Bank on 5th Wheel Trailer is Wired in Series or Parallel
  • That depends on how the batteries are wired. If the battteries are wired in series like I believe they are that would mean you have two 6 volt batteries wired in a way that makes the output 12 volts. If they were wire in parallel it would be to 12 volt batteries wired so that the output is 12 volts. Check out the picture I attached that shows how the different style of battery wiring look to compare to what you have.
    view full answer...

  • How to Find the Stop Light Circuit on a 2018 Jeep Grand Cherokee
  • For starters, have you checked for the brake controller adapter port under the drivers kick panel near the emergency brake pedal (see video). If not I recommend doing so as most of these vehicles came with the brake controller adapter port regardless if yours came with the factory tow package or not. If you have a Tekonsha brake controller like the Tekonsha Prodigy P3 Trailer Brake Controller part # 90195 and you have the brake controller adapter port then you can use the Tekonsha Plug-In...
    view full answer...

  • Troubleshooting P3 Brake Controller that Has Short Error Code at 5 mph
  • Most likely you have a couple wires wanting to contact each other when the vehicle is moving fast enough to shake the wires which is why the short goes away at a stop but then alternates between the two error codes you mentioned. If the problem only happens when the trailer is connected it's on the trailer's side of the wiring but if all the time it's on the vehicle side and most likely near the controller itself.
    view full answer...

  • Difference Between 7-Way Wiring Diagram that Uses Red Wire and Purple Wire
  • There are actually two ways that 7-way wiring colors are commonly seen. One uses a red wire and the other a purple. The circuits they represent do vary though. So check out the updated diagram I attached to this page and most likely you need to wire the connector up like the center one.
    view full answer...

  • Troubleshooting No 12 Volt Accessory Circuit Present on 7-Way of 2008 Nissan Frontier
  • On your 2008 Nissan Frontier, there should be a relay and there could be a fuse for the 12 volt power circuit on the factory installed 7-Way. To find the locations you will want to look in the owners manual. However I checked a copy online and there was no specific information about the fuses/relays and what they do. This information then is most likely on the lid of the power distribution box under the hood and on the inside cover of the in-cab fuse panel. I believe you will need a...
    view full answer...

  • 4-Way to 5-Way Adapter Recommendation for Boat Trailer
  • An extra red wire for trailer wiring is not commonly seen, but since you said this is a boat trailer it's most likely for a reverse lock out solenoid. Does the trailer have surge brakes? If so, this would be the case. This circuit would need to get run to the reverse light circuit of your tow vehicle so that the actuator can allow the trailer to be reversed. We have vehicle 4-way to 5-way adapters as part # 20036 but before we go down that route let's first be sure the red wire is the reverse...
    view full answer...

  • Troubleshooting Absent Brake Signal with the Hopkins Converter # HM48895
  • If your tow vehicle has separate lighting and you need to combine the stop signal with your turn signals then yes, the Hopkins Tail Light Converter Kit # HM48895 that you referenced should be what you need. Try checking the wiring itself with a tester like part # 3808. If the brake signal is appearing on the yellow and green wires but is not showing up at the connector then it could be as simple as a bad connector. If you are getting a signal all the way to the connector and it just...
    view full answer...

  • Third Brake Light Wire Location for a 2015 Chevrolet Silverado 1500
  • Sometimes there is a blue wire in the loom of the 7-Way but if you are not seeing one that likely means that there is an orange wire under the dash on the driver's side of your 2015 Chevrolet Silverado 1500 that you need to use. This should be the CHMSL wire and carries the stop light signal that you would need for a 3rd brake light. I would try locating this wire and testing it with a circuit tester like part # 3808 before routing wire for your application.
    view full answer...

  • Troubleshooting Seven Blade Vehicle Side Trailer Hook Up with Constant Power to Right Turn Blade
  • Your right turn signal and brake blade are right next to the 12V power on your 7-way. It is not uncommon at all for corrosion or debris to cause a connection between these blades that would cause exactly what you are describing of a constant power on that blade. I recommend using some sand paper and an old toothbrush to really clean those blades and then use some dielectric grease # 11755 to keep the moisture, corrosion, and debris from happening in the future. If cleaning your blades...
    view full answer...

  • Turn Signals Do Not Work on Truck When Trailer is Connected
  • The issue you are describing sounds like a ground problem. The ground issue could either be on the trailer connectors or the trailer lights themselves. I recommend removing each of these grounds and then sanding the mounting point and reattaching. I would also recommend that you check and clean the pins inside each of the trailer connectors. If you have access to a different tow vehicle or trailer then you could easily determine if the fault is on the tow vehicle or trailer but more...
    view full answer...

  • No Trailer Lights When Using Tow Vehicle 2014 Volkswagen Tiguan
  • The issue with a trailer connector tester like part # 6562 is that they do not always work on other brand's wiring harnesses. This can make it difficult to determine where the fault is in the wiring or if one is even present so we always recommend using a test light like part # 3808 as these are much more precise. With that being said it sounds very likely that there is an issue on both your Tiguan and trailer. I would first start off by checking the fuse box on the vehicle for any blown...
    view full answer...

  • Right Hand Turn Signal and Brake Lights Not Working
  • As you mentioned, the fuse box is the first thing you will want to check but be sure to look in your owner's manual so you know you are checking all the necessary locations. The next step will be to check the ground for the right hand side trailer light. If the fuse and ground is good then the only other option would be to begin tracing the right hand turn/brake signal wire back to the starting point using a circuit tester like part # 3808 and testing at intermittent points to see where...
    view full answer...

  • Wiring Diagram for the Pollak Metal 7-Pole RV-Style Trailer Socket Part # PK12703
  • I have attached the wiring diagram of the Pollak Metal 7-Pole RV-Style Trailer Socket part # PK12703 for you. Please keep in mind that the diagram follows an RV standard configuration which will need to match what is on your trailer.
    view full answer...

  • Connecting RV with US 7-Way to Trailer with European 7-Way
  • It sounds like you are needing to connect the US style 7-Way that is on your imported Gulf Stream RV to a European 7-Way on the car platform you are looking to purchase. The European 7-Way essentially does the same thing that a US 4-Way does. Unfortunately, there isn't an adapter available to connect the two styles, as the European 7-Way has separate circuits for nearly every function on each side of the trailer. A US style 4- or 7-Way has combined brake lights and turn signals. Your...
    view full answer...

  • Installing a Brake Controller in a 2009 GMC Sierra 1500
  • It does look like you might have made some wiring errors during the installation. I have also linked a video that will help. On the 2009 GMC Sierra 1500 when installing a brake controller make the following connections to the brake controller: Truck red wire to controller black wire (12 volt power to brake controller) Truck dark blue to controller blue wire (output to trailer brakes) Truck light blue (or orange if light blue doesn't work) to controller red wire (input from brake switch) Truck...
    view full answer...

  • No Brake Light Function from Hopkins Tail Light Converter Kit HM48895
  • The Hopkins 4-pole wiring harness made for your 1996 Nissan Pickup is kit # HM43505 which appears on the linked page along with similar items # 118353 from Tekonsha and # C55353 from Curt. All of these wiring kits use custom-fit plugs for simple installation at the truck's taillight connectors. No splicing is required for these custom kits. The Hopkins hardwired harness # HM48895 is made for newer vehicles that use LED lights. This item has a red wire that splices to a vehicle's brake...
    view full answer...

  • Difference Between Tow Ready # 20142 and Curt # C57003 Adapters with Lamp-Out Sensors
  • If you will be towing a trailer with LED lights then you will likely need to use an adapter with a lamp-out sensor like the Tow Ready # 20142 or Curt # C57003 that you referenced. Both of these adapters will accomplish the same task; plugging into an existing 7-Way on your Audi and providing a new 7-Way that is able to recognize the LED trailer lights. The only difference between the two items is the bracket/housing and the wire extension on the Curt # C57003. If you don't need this and...
    view full answer...

  • Troubleshooting Left Stop/Turn Signal on Trailer Wiring Not Functioning
  • 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...

  • 7-Way Diagram Recommendation to Test Wiring of Motorhome with
  • Most likely you have a 7-way at the rear of your tow vehicle which I attached a diagram for how it would be pinned out. You'd want to use a circuit tester like part # 3808 to test the pins of the 7-way to make sure they match the diagram.
    view full answer...

  • Troubleshooting Jayco Popup Camper Brakes and Tail Light Turn Signals
  • Your trailer light functioning sporadically and the lack of function at other times leads me to believe there is a power issue. It sounds like there is a ground connection issue, but it could also be that there is a power supply issue. I recommend testing your wiring using an incandescent circuit tester like # 3808. Some testers will utilize LED lights that don't draw the same power as incandescent bulbs so they may give you a false reading on power. Double check the ground on your...
    view full answer...

  • Finding 12V Power Wire at Frame Rail on 2011 Ford Expedition with Factory 4-Way
  • For your 2011 Ford Expedition with 4-way flat, the wiring harness # 3035-P is a fit to allow you to install your Prodigy P2 brake controller # 90885. The blue brake output wire you found is the correct fit and you should also have the 12V power wire along the rear frame rail. There should be an orange wire for the 12V power to connect to your black power wire on your connector. If this wire is not present, then I recommend testing the wires in that location for 12V power using a circuit...
    view full answer...

  • No Splice Trailer Wiring Recommendation for 2004 Lexus LS 430
  • I have a great trailer wiring solution for you. The ZCI kit part # 119250KIT is a trailer wiring kit that uses sensors instead of splices which means you don't have to worry about trying to splice into the very thin wiring of your 2004 Lexus LS 430.
    view full answer...

  • Troubleshooting Trailer Running Light Circuit that Comes on When Trailer Wiring is Plugged In
  • You have a short between the 12 volt running light circuit of your trailer's wiring and the running light circuit. This is causing the voltage from the 12 volt circuit to backfeed onto both the trailer and truck. You need to check out the connector of the trailer on the front and back looking for any exposed wire or corrosion and fix as needed.
    view full answer...

  • Wiring Diagram for Pollak Heavy Duty 7-Way part # PK11720
  • The Pollak Heavy Duty 7-Way part # PK11720 that you referenced is a heavy duty style 7-way. If you check out the attached diagram you'll see how it should be wired.
    view full answer...

  • No Running Lights on Trailer
  • Have you tested for power at the running light wire just before each taillight while the running light circuit is active with a circuit tester like part # 3808? If not then this would be the first place I start. If there is no power to the running lights then you will need to begin tracing the circuit back to the point of origin while using the circuit tester along the way to see where the connection stops. Pay special attention to the trailer connectors and the pins inside. If you cannot...
    view full answer...

  • Right Turn and Stop Signal Works on 2017 Road King Trailer but Left Turn and Stop Dont
  • This sounds like a simple case of a bad ground on your 2017 Road King. It could be on your 2017 GMC Sierra 1500 but since the right side of your trailer works fine I think the issue is on the trailer side of things. Check the connector on your trailer and make sure that everything is clean and corrosion-free and then move on to the grounds. Check the grounds for the lights on the left side of your trailer and make sure they are securely connected to a clean, bare-metal surface. Sometimes...
    view full answer...

  • Troubleshooting Running Lights Not Working with 7-Way on Trailer that Only has 4 Wires
  • Since we know that the problem is isolated to the running light circuit on your trailer then that is what you need to inspect. When wired correctly, the running light circuit on your trailer should be connected to the pin in the 2 o'clock position on your trailer side 7-Way (see attached picture). Start off by making sure that pin is clean and free of corrosion. Then look along that wire and check for any places where the wire may be damaged, exposed, or bent and replace as necessary....
    view full answer...

  • Right Turn Signal in Truck Side Trailer Connector Has No Power
  • Since you do not have power on the right turn signal/brake light pin on the truck side connector that would indicate that the issue is on the truck side. It could just be a tow package fuse that is blown or a relay that has gone bad. You can check your vehicle owner's manual for fuse and relay functions and locations for most vehicles. Otherwise the locations and functions will be found inside of the fuse panel lids. If everything checks out fine then inspect the wiring to the connector...
    view full answer...

  • Troubleshooting Boat Trailer Right Side Tail Light
  • Since you have everything working on your tail light on the left side, but not on the right side, we can do some troubleshooting using a circuit tester like # 3808. You can probe the trailer wires to determine the running light/clearance light wire, then you can find the turn signal and stop light wire or wires if they are separate. Then you will have either a ground wire or a reverse light wire. It is most likely that you have a ground wire based on your description that just needs...
    view full answer...

  • Recommended Trailer Wiring Harness for 2006 Honda Element
  • For your trailer wiring that does not require a separate power wire from the battery of your 2006 Honda Element, I recommend the Hopkins Tail Light Converter Kit with 4-Pole Flat Trailer Connector # HM48925. I've attached the installation details to further assist with the installation.
    view full answer...

  • Turn Signal Shows Hot all the Time with Plug-In Trailer Connector Tester
  • If a 4-way trailer connector tester like part # I26 shows that the drivers side turn signal on the Curt T-Connector Vehicle Wiring Harness part # C56344 for your 2014 Jeep Compass is constantly hot then you would first want to remove the driver's side tail light assembly. Once this is done you would then need to remove the connector to the harness and inspect the pins making sure none of them are bent and or corroded. If they are then you will need to clean them up with some electrical...
    view full answer...

  • How to Tell if the Brakes are Working on a Horse Trailer
  • The easiest way to tell if the brakes are working on the trailer would be engage the manual override and have a friend sit outside the vehicle and watch the wheels on the trailer. If they begin to drag when you let off the brake pedal (slowly) on the tow vehicle then you know they are working. You can also test the brake output wire just behind each assembly with a circuit tester like part # 3808 to ensure they are receiving power. If the brakes are not engaging then please let me know...
    view full answer...

  • Can You Install a Female Trailer Connector on the Trailer and Vehicle
  • The photos you referenced did come though but as long as you attach the wires in the correct locations then there should not be an issue. I will say that if you are going to be replacing and or wiring a new connector onto the vehicle or trailer you may as well do things the correct way which would be to install a female 7-way on the vehicle and a male 7-way on the trailer. In order to do this you will need part # PK12706 for the trailer and part # PK12-707E for the vehicle. There are...
    view full answer...

  • Why is There 12 Volts on the Black Wire for my Trailer Connector
  • If you are referring to the 12 volt pin that is located in the 1 o'clock position on the 7-way trailer connector then there should be 12 volt power feeding from the vehicle to the trailer on that pin. This means that if you test the 12 volt wire (usually black) before it enters and exits the controller, there should be 12 volts on either side assuming the 12 volt wire on the trailer is ran to a battery for maintenance changing purposes. Attaching two 12 volt power wires together will not...
    view full answer...

  • Troubleshooting Trailer Brake and Turn Lights not Working With 2010 Toyota Tundra
  • If the issue is only with your trailer's brake and turn signals when connected to your 2010 Toyota Tundra and not other vehicles and you are absolutely sure the ground is good, then there are a couple of things you will want to check. Start by using a circuit tester such as # 3808 to test the signals going into your Tundra's connector to ensure they are all working properly. There may be an issue such as loose, crimped, or otherwise damaged wires and fix as needed. Also check your Tundra's...
    view full answer...

  • Does 2006 Lincoln Town Car Need Trailer Wiring Harness with Power Ran From Battery
  • Not all vehicles can handle the additional amperage draw of the trailer taillights on the vehicle taillight circuits. Those vehicles need setup that draws power from the battery. Some vehicles have higher rated circuits that can handle this, and others need to have the power drawn straight from the battery to protect the taillight circuits. For your 2006 Lincoln Town Car you need to install a harness that draws power from the battery to protect the taillight circuits. For that you would...
    view full answer...

  • Troubleshooting Trailer Wiring Where One Stop/Turn Light Assembly is Brighter than Other
  • That is an odd problem. Do you have access to a volt meter? You might try checking the volts of both the left and right side to see if there's a voltage drop between the two. Does the trailer have quite a bit of lights that would potentially draw too much amperage? One thing you can try which isn't ideal since it requires cutting trailer wiring is cut the left stop/turn circuit near the connector as well as the right stop/turn circuit and basically reverse the circuits and reattach them...
    view full answer...

  • Trailer Wiring Recommendation for Vehicle with Separate Turn Signals from Brake Lights
  • What you need is a trailer wiring harness that has a converter box designed to take separate circuits and combine them onto a single wire. This is a very common situation. The trailer wiring harness part # 119190KIT would be what you need and would work well. It will give you a 4-way connector to connect to your trailer. If you need a 7-way you'd want the part # 37185 along with it.
    view full answer...

  • Troubleshooting Trailer Lights With 3 Wires Connection to 4-Wire Trailer Wiring Harness
  • Your plug wires will have running light, stop and turn light for each side and then a ground connection. Your trailer lights with 3 wires will either have separate stop and turn lights or a separate ground wire instead of using the mounting hardware as ground. You will want to use a battery and jump wire to test your trailer light wiring unless it is obvious based on the light bulb sockets. If the wiring is connected, you can use a circuit tester like # 3808 to probe the insulation on...
    view full answer...

  • Brake Controller Wiring for 2008 Honda Ridgeline With 4-Way
  • If your 2008 Honda Ridgeline is not wired for a brake controller you are going to need the Universal Installation Kit for Trailer Brake Controller # ETBC7 which includes the wiring, circuit breakers and the necessary 7- and 4-way connector. You will need to plug this into your Ridgeline's 4-way and then wire the 7-way. For your trailers that only have a 4-way you can simply use the Pollak 7 Pole to 4 Way Connector Adapter # PK12716 to connect your trailer to the 7-way on your '08 Ridgeline.
    view full answer...

  • Is Additional Breaker or Fuse Needed to Power Trailer Jack that Uses 7-Way Connector
  • Typically the 12 volt accessory circuit for trailer 7-way wiring is protected by a 40 amp fuse or breaker like the part # 9510. If your 12 volt accessory circuit on your 2014 F-350 is already active there would be no need to install a different or additional fuse or breaker. You would be fine as-is. 7-way powered jacks are designed for standard amperage available at the rear of a 7-way so what you'd have is fine.
    view full answer...

  • Does 12 Volt Accessory Circuit of 7-Way Have to Activate for Brake Controller
  • It is not needed to wire up the 12 volt power circuit of a 7-way to use trailer brakes. Those two circuits are totally separate. If you don't have a need for a 12 volt accessory circuit you would not need to activate it and the controller will work just fine.
    view full answer...

  • Troubleshooting SH Error Code on Trailer Brake Controller
  • The SH code of a brake controller indicates that there is a short on the brake output circuit. This means that some where between the brake controller and the brake assemblies of your trailer the circuit is shorting out to something metal. Commonly this is due to corrosion on the trailer connectors. This can be fixed by hitting the connector with some fine grit sandpaper. Aside from that you will need to trace the wiring from the brake controller basically back to the brake assemblies...
    view full answer...

  • Adapter Recommendation for Converting Separate Trailer Brake Lights from Turn Signal to Combined
  • We have a signal converter that is designed for converting your signal which is separate to combined for the stop and turn circuit. For that you'd want the part # RM-732 wired into your vehicle taillights and you'd be set.
    view full answer...

  • Brake Controller and 7-Way Recommendation for 2005 Ford Explorer
  • Sounds like your camper uses the Jayco style 6-way square like what the part # 37995 has. It also sounds like you found the connector for a 4-way on your 2005 Ford Explorer like what the part # C55251 is designed to attach to. If you have a Coleman camper the connector is similar but different. To convert the 4-way of your Explorer to a 7-way (after installing the part # C55251), you'd want the part # ETBC7 plus a brake controller like our P3 part # 90195. Then you could use the # 37995...
    view full answer...

  • Troubleshooting Brake Controller that Only Shows a Few Volts When Tested with Brake Pedal
  • If you have a proportional brake controller you won't get full voltage when using the brake pedal and testing the pin since the controller needs to see sense deceleration before really applying voltage. If you have a proportional brake controller like it sounds like you do this would be what's going on. A lot of proportional controllers will put out a very small voltage spike when they sense that the pedal is applied which explains why you saw a small amount.
    view full answer...

  • 7-Way to 6-Way Adapter Recommendation for Truck with 6-Way
  • Based on what you described the correct adapter is the part # 47435 as this will plug into a 6-way on your truck and allow a 7-way from a trailer to plug into.
    view full answer...

  • 7-Way Trailer Wiring Recommendation for 1999 Ford E-150
  • You will need to start with a 4-way (if you do not have one). For that you would want the # 118344. Now if your trailer does not have brakes all you would need is the part # 37185 as an adapter to convert the 4-way to a 7-way. If you do have trailer brakes you would need the # ETBC7 instead of the # 37185 and a brake controller. This kit comes with everything needed to wire up the 7-way and install a brake controller. For a brake controller I would recommend the Prodigy P2 Brake...
    view full answer...

  • Wiring Diagram for 7-Way Trailer in Bed of 2008 Dodge Ram 2500
  • The in-bed trailer wiring connector your 2008 Dodge Ram 2500 would have would be a 7-way like the part # PK11893 that you referenced. I attached a picture that has a standard 7-way wiring diagram for you to check out.
    view full answer...

  • How Does Wishbone 4-Way Wire to Trailer's 4-Way Wiring that has 7 Wires
  • The two white wires are the ground circuit which would run to the white wire of the # A20WB, the black wire has to be the right turn/stop signal although that color is typically solid green. The brown is a running light circuit that runs to clearance lights on the trailer, the yellow brown runs to the taillight assembly for the running light circuit, and green brown is the left turn/stop circuit. All of these run to either of the brown wires of the 4-way, and then the yellow is the left...
    view full answer...