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Expert Answers about Wiring


  • How Do I Troubleshoot The Trailer Wiring Of My 2022 Toyota Highlander
  • In order to troubleshoot your 2022 Toyota Highlander wiring installation you will need some tools to assist you. You will need a 12V circuit tester. I recommend the Cordless Circuit Tester, part # PTW2979. In addition, you will also need basic wiring tools, electrical tape, a wire stripper, dielectric grease, and wiring fasteners. Troubleshooting your trailer wiring can be very intensive. This can be caused by a number of issues. If you have a plug in harness, it may be for models with...
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  • How to Tell if Replacement Controller For Solera Smart Arm Awning is Needed
  • I'm sorry to hear about the troubles you are having with your awning, and you're right about the design; it certainly seems flawed if the AC water gets blown right toward the controller. From what you described, it seems very likely the controller is bad, but what you can do to check is use a circuit tester like # PTW2979 to test that there is power going to the controller. If there is, and the controller is not working, you will need the replacement: - Replacement Controller and...
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  • Complete Flat Towing Setup For A 2020 Chevrolet Silverado 1500
  • For your 2020 Chevrolet Silverado 1500, I recommend the Deka Lead Quick-Disconnect Battery Terminal # DW05312. This will allow you to quickly disconnect the battery leads through use of a hand knob. If you're interested in what you need for a complete flat towing setup, you'll also need: -A base plate # RM-523199-5. -A tow bar # RM-676. -A braking system # DM26VR. -Tow bar wiring # RM-154. and a high low adapter # RM-058-4. You'll want to double check what kind of...
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  • Does 12-V Trailer Connector Circuit at 7-way on 2017 Ford F350 Remain Active With Vehicle Running
  • Once the trailer is plugged in and the brake pedal is depressed, the 12-volt power circuit on the trailer connector will become active, and can be used for whatever purposes you wish. Keep in mind that this circuit can maintain a trailer battery, but it won't have the available grunt to charge a discharged battery. To fully charge the battery while the tow vehicle is running, you'll need a DC to DC charger like # 331-BCDC1240D for a 40 amp or # 331-BCDC1250D for a 50 amp charger. If you...
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  • Wiring Needed For Electric Trailer Brakes On a 7,000LB Car Hauler Trailer
  • For the brake wire on your 7,000lb car hauler you will want to use a 12 Gauge Wire # 12-1-1 for the power wire. The ground wire can either be grounded to the frame or you can use the Jacketed 2 Wire # 12-2-1 if you are not using the frame as a ground. I have included a chart below that has the suggested wiring sizes needed for a 7-way trailer harness. This wiring will need to connect to your 7-Way Junction Box # e99011 and Breakaway Kit # 20400.
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  • Parts for New Wiring and Taillights for Gooseneck Trailer
  • We have 7-way jacketed wiring with the Deka Wiring part # DW04914-1 sold by the foot which you could use to run all new 7-way wiring but you'd have to run individual wires to each circuit/light which a lot of people use a junction box like the # e99011 which comes with a new 7-way. This is the route I would go with this box and a taillight kit like the LED Tail Light kit part # TLL56RK which comes with wiring for the lights and a license plate bracket. For any other circuits you'd want...
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  • How To Install a Brake Controller on 2017 Mercedes-Benz Sprinter 3500
  • You can hard-wire in a brake controller and it seems that there are not a lot of the Sprinter 3500 models that are pre-wired, at least from what I've seen in my research. I have not seen any reports that this isn't possible, and we even have an installation video to walk you through the process. The way to find out whether or not the plug is present by using a circuit tester like the # 40476 and testing for a hot wire when the brake is pressed- it's possible that one of the plugs that...
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  • How Many Sets of Electric Trailer Brakes For Tandem 3,500 lb Axles When Converting From Hydraulic
  • Excellent questions, and let's start with your query about having brakes on both axles. The answer is that you do indeed want to have brakes on both of your 3,500 lb tandem axles. The reason is because just one set of 3,500 lb brakes won't have the stopping power required for a trailer that weighs 5,000 or 6,000 lbs, and also just one set of brakes will also wear out very quickly as they'll be overworked for the load they are rated for. So for the best stopping power and safest way...
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  • Replacement Options For Bargman 30-84-013 Double Tail Light
  • We do have replacement options, though the Bargman 30-84-013 taillights have been discontinued and there's no available lenses, which means you will need to replace the light. What you can do is choose from either an incandescent or LED option, and I highly recommend the LED because they are brighter and last much, much longer than incandescent lights. The options are the following: - Bargman LED Double Tail Light # 47-84-529 - Bargman Trailer Double Tail Light - Incandescent # 30-84-527 These...
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  • Adding a Charge Line Circuit To a Trailer With a 4-Way/5-Way Flat Connector
  • I recommend moving away from the Adapter 4-Pole to 5-Pole Trailer Wiring Adapter # 47515 and going with a Buyers Products Trailer Connector Adapter # 337TC1474P. The wiring and connectors used on the 4-way harness are not designed to be used with the 20amps of power you will putting on the connector. The 4-way/5-way connector cannot handle the additional strain and it will likely overheat with the amperage and risk causing an electrical fire. With the Buyers Products Trailer Connector...
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  • What Ohms Should Trailer Brake Magnets Be?
  • Assuming that when you tested the resistance of the brakes you were testing the two wires on each magnet and getting 2.0 and 2.8 ohms the magnets on your trailer are not working correctly and will need to be replaced. For 7" brakes you should get 3.8-4.0 ohms, and for 10-12" brakes you should have 3.0-3.8 ohms. If the brake shoes themselves are good you can replace just the magnet using 7" # AKBRKR-M7, 10" # AKBRKR-M10, or 12" # AKBRKR-M12. If the shoes are needing replacement...
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  • Parts Needed to Add Electric Trailer Brakes to Trailer With 3,500 lb Axle
  • We can get your trailer with a 3,500 lb axle set up with electric brakes, and the first thing you'll need to do is be sure your axle has a 4-bolt brake mounting flange. If not, you can have one welded to the axle beam, but if you already have one you won't need it. I'll go ahead and list out all the parts needed: - Hub and Drum: Dexter Trailer Hub and Drum Assembly for 3,500-lb Axles - 10" Diameter - 5 on 4-1/2 # 84546UC3 - Brake Mounting Flange for 2-3/8" Round Axle # 4-35 - Electric...
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  • Wire Functions of Triple LED Trailer Tail Light CE44VR
  • While we wouldn't have any way of knowing what the 8 wires are for with your current light, I can tell you the functions of each wire for the Triple LED Trailer Tail Light # CE44VR. Then what you would need to do is match those wires with the correct ones on your RV, and you can find out what wires are for what function on your RV by using a circuit tester like the Cordless Circuit Tester # PTW2979. After that it would just be a matter of matching the wires by function (and not color),...
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  • Parts to Convert Surge Brakes to Electric Brakes on Boat Trailer With 3,500 lb Axles
  • Thanks so much for that info, and we can get your boat trailer set up with electric brakes. Since you had an idler hub you will need a hub and drum for electric brakes, and with the bearing numbers you gave, that means you have 3,500 lb axles. That said, here is everything you'll need to make the conversion: - Trailer Hub and Drum Assembly - 3,500-lb Axles - 10" Diameter - 5 on 4-1/2 - Galvanized # AKHD-545-35-G-K - Electric Trailer Brake Kit - Self-Adjusting - 10" - Left and Right...
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  • Thinnest Material LED Trailer Mini Clearance Light w/ Grommet Will Fit
  • The thinnest material is 1/16" to fit the LED Trailer Mini Clearance and Side Marker Light with Grommet # MCL10AKB. You can connect the wires with the 22-18 Gauge Butt Connectors # 05730-5.
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  • Is the Jacketed 2 Wire # 12-2-1 Copper or Aluminum Wire?
  • The Jacketed 2 Wire # 12-2-1 contains copper wires. The copper is annealed which can sometimes give it some discoloration which is why it looks more aluminum in the image.
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  • Will the Pollak Circuit Tester Work on Newer Trucks Using LED Lights
  • While the Pollak 7-Way to RV Socket LED Circuit Tester # PK12741 is designed to work with all 7-way connectors. There have been issues with vehicles such as Audi, Mercedes-Benz, and Volkswagen that have issues due to the LED lights having such a low power draw. The newer truck models are starting to have some of those same issues since they are starting to use led lights as well, so the tester will most likely not draw enough power to work. The best way to remedy that if it happens for...
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  • Reverse Light & Wiring For Boat Trailer
  • So in order to add a reverse light to your boat trailer, all you need to do is connect the wiring from your junction box or 7-way directly to the reverse light's wires. For reverse lights, if you don't already have wiring at the junction box or your 7-way, what you can do is add 14 Gauge Primary Wire - Blue - per Foot # DW02414-1. Then you will simply run that wire to the reverse lights, which you can connect with butt connectors. The exact parts you will need to do this are the following: -...
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  • Wiring LED Tail Lights with Four Wires
  • If the wires from your trailer are good and the power is good, then we just need to figure out what each wire on the light itself does. The best way to do that is to take a 12 volt power supply and apply that to each of the wires on your lights to see which bulb it illuminates. For example, when you use the Fusion LED Combination Tail Light Bar part # STL264RB, this has white, black, red, and yellow wires. The functions of these colors on this lights are as follows. Black: Tail White:...
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  • What are the Colors of the Wires of the Deka Wire Jacketed 7-Way Wire DK74FR
  • Yes, the wire colors of the Deka Wire - Jacketed 7-Wire # DK74FR are the industry standards that you mentioned. Black, white, red, green, white, yellow, and blue.
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  • Wire Gauge of 7-Way & Junction Box
  • While we have an alternative, the part number you asked about has been discontinued. But what you can use is the Trailer Wiring Junction Box # 3375601100 and Hopkins 7-Way RV Style Connector - 8' Long # H20046. This 7-way uses 14 gauge wires for the red, brown, green, and yellow; 12 gauge for the blue; and 10 gauge for the white and black wires.
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  • Plug-In Location For 4-Way Wiring Harness on 2022 Subaru Outback
  • Yes, the 2022 Subaru Outback - including the Premium - does have a location to plug in the 4-way. It is under the rear threshold plate in the cargo area, near the passenger side. I have added a photo for you showing the location, and you can get to it easily by using Trim Pad Remover # ALL648544. The correct 4-way wiring harness for your 2022 Subaru Outback is the following: - T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118467
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  • 7-Way to Cigarette Lighter Adapter for Powering Air Compressor
  • Sounds like your air compressor is drawing more amperage than your adapter is rated for. A better adapter solution would be the part # 118019 which doesn't have the 10 amp restriction like your current adapter. If you check out the review video I attached for this adapter you can see our installer use it to power a similar air compressor as yours.
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  • Converting to Electric Trailer Brakes From Hydraulic on 3,500 lb Axle
  • Yes, we can get your set up to go from hydraulic to electric brakes, and your photo (thanks so much for that) shows you have a 10 inch brake drum. So here is everything you'll need in order to switch: - Electric Trailer Brake Kit # AKEBRK-35-SA - Mounting Hardware for 10" Brake Assemblies # BRKH10B - Deka Jacketed 2 Wire, 10 Gauge, Brake Wire - per Foot # 10-2-1 - Bright Way Push-to-Test Trailer Breakaway Kit # 3802308 - Deka Heat Shrink Butt Connector - 12-10 Gauge # DW05745-5 The...
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  • Can I Use the Tekonsha 7 Way Plug Tester with a Redarc Tow Pro Liberty Brake Controller
  • Yes. The Tekonsha 7-Way, RV-Style Tester for Brake Controllers - LED Test Lights # 6562 will plug into a 7 way trailer plug on your 2015 Toyota Highlander and allow you to test the function of a Redarc Tow Pro Liberty # RED24FR without any issues.
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  • Installing 7-Way Trailer Connector on 1995 Japanese Market Toyota Land Cruiser Prado
  • To add a 7-way to your Japanese Domestic Market 1995 Land Cruiser Prado, you'll first need a functioning 4 pole trailer connector. You can install one using part # 119147KIT which would need to be hardwired into the existing taillight wiring harnesses. The # 119147KIT taillight converter harness includes a circuit tester and all the wire, fuse holder, fuse and hardware needed to complete the installation. While a helper activates each turn signal function, you can use the tester to probe...
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  • Dexter Self-Adjust Electric Brake Fit For 2016 Heartland Cyclone 4200 Toy Hauler
  • Absolutely; the correct Dexter self-adjusting electric trailer brakes that fit your 2016 Heartland Cyclone 4200 toy hauler are the following: - Dexter Nev-R-Adjust Electric Trailer Brake Kit # 23-464-465 The # 23-464-465 includes both the left and right brake assemblies, though you will need the mounting hardware, which is the Mounting Bolts and Hardware # BRKH12. Also, to connect the wires I recommend using the Deka Heat Shrink Butt Connectors # DW05745-5. These come in a pack...
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  • Wire Gauge of USB Power Outlet for RVs - 2 USB Ports 37215115
  • 14 gauge wire is used with the USB Power Outlet for RVs - 2 USB Ports # 37215115. So you can connect the wires with two of the Butt Connector - PVC - for 16-14g Wire # DW05714. Then to mount it in the correct plate is the Mounting Plate for 12V Socket or USB Outlet # 37215155. I have added some links below to video reviews for you to check out as well.
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  • Troubleshooting Thermostat That Is Reading The Wrong Air Temperature.
  • Great question, lets walk through some troubleshooting steps and figure this out. **Digital Multimeter with 42" Long Test Leads - LED Display # PT89ZR. Since we will be troubleshooting I recommend you get a multimeter like the digital one linked above. First, make sure you have the thermostat on the right setting. I know it seems obvious but sometimes we just forget to switch it over from hot to cold or vice versa. Next turn the thermostat to at least 5 degrees different than...
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  • Comparison Between 6562 & Standard 7-Way Testser
  • A standard 7-way plug-in tester like the Tekonsha 7-Way, RV-Style Tester # 6562 gives you basic functions of the 7-way, and is a great choice for doing that. The difference is the voltage and current given for the different functions with the Current Monitor with 7-Blade Connector # 6565. That is the biggest difference, along with the long cable from the 7-way so you can use the manual override to check your brake controller voltage and current at different settings. That's the difference,...
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  • Basic 2-Wire Brake Light Wiring
  • I suspect that you have a 3-channel connection for the light, with the red wire being the Stop/Turn light, and black being the Running/Marker light, and the light mounting bolt being the ground connection. On the left/driver side the red wire goes to yellow, and the black goes to brown for tail lights. On the right/passenger side the red goes to green, and the black goes to brown for tail lights. I have attached a document with trailer wiring diagrams. Occasionally things are color...
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  • Can Junction Box be Submerged When Rewiring Boat Trailer
  • You can re-do the wiring on your boat trailer with a junction box, but a junction box cannot be submerged as they aren't waterproof. So if you are able to place the junction box in a location that allows it not to be submerged, the best option is the Trailer Wiring Junction Box # 3375601100. This comes with ring terminals and if you need wire we offer it sold by the foot with 12 Gauge # 12-1-1, 14 Gauge # DW02413-1, 16 Gauge # DW02359-1. You may also need Wire Loom # 459075-1 and...
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  • Recommended Replacement Weatherproof Junction Box/7-Way Pigtail
  • For the 7-way pigtail/junction box, I'd recommend the # 277-000141 junction box/pigtail which will do a good job of keeping the water out unless it's submerged. Adding a bead of silicone caulk around the seams where the lid meets the box and where the wires pass through would be a good idea as well. For a marker light that's 4 inches in length, 2 inches tall and 1-1/8 inch thick with mounting holes 3 inches on center, I'd recommend the # 47-59-002 LED Clearance/Marker light from Bargman....
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  • Electric Brakes & Bearings For Livin Lite Quicksilver 6.0 Camper Trailer
  • That is fantastic information, much appreciated, and based on that we have exactly what you need for electric brakes and bearings for your Livin Lite Quicksilver 6.0. The 8-257 is the Dexter Trailer Hub and Drum Assembly for 2,000-lb Axles - 7" - 5 on 4-1/2 # 8-257-5UC3, and the 023-048 are 7 inch brakes, so here is exactly what you'll need: - Electric Trailer Brake Kit - 7" - Left and Right Hand Assemblies - 2,000 lbs # AKEBRK-2 - Mounting Hardware for 7" Brake Assemblies # BRKH7 -...
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  • Brakes On Trailer Stop Engaging When Using Tekonsha Prodigy Brake Controller
  • I would begin by checking the connections on the back of the brake controller. You will want to make sure none of the wires have become disconnected or that there are not any bad connections. It sounds like the Blue wire which sends power to the trailer brakes may have a bad connection somewhere. I would start by cutting the blue wire a few inches from the brake controller and see if you get signal. If you do get signal, the Blue wire may have a bad connection somewhere. If you do not get...
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  • Recommended 7 Way Trailer Wiring Harness for 2015 Jeep Wrangler Unlimited JKU
  • In order to install a 7 way connector on your 2015 Jeep Wrangler JKU I recommend using the Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires # ETBC7L. The # ETBC7 uses the functions of your existing 4 way and comes with the wiring, butt connectors, circuit breakers and ring terminals needed to complete the installation. The good news is that because you'll be using the Tekonsha Prodigy RF # TK94FR, you won't need to run a wire for the brake...
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  • Installing Brake Wiring on a Trailer
  • I have attached a diagram for you to check out. This is taken from a helpful article on our site about wiring that I have linked for you as well. The Blue wire on the diagram is what you want to pay special attention to. If you can route it through a tube for more protect then that's what I recommend doing. The wire that should be used for the trailer brakes needs to be 10 Gauge Wire # 10-1-1. You can use Butt Connectors # DW05745-5 to make your connections. Simply splice 2 ends of...
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  • 7 Way Trailer Connector Vehicle Tester For 2020 Ford F-150 With OEM Trailer Brake Controller
  • Yes, the 7 Way Trailer Connector Vehicle Tester # TR20117 is specifically designed to work with the OEM integrated brake controller on your 2020 Ford F-150 with the tow package and pro backup assist. It may or may not work with other vehicle manufacturers OEM controllers if you are wanting to use it with multiple vehicles.
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  • Measurements For Body Chassis and Frame Clips
  • We offer a few different frame clips. The Wire Frame Clip Item # 464600 which is 1-1/2" long x 1/2" wide with a 3/8" gap for wiring. We also have the Medium Body Chassis and Frame Clip - Qty 1 Item # SWC9041-1 is 1-11/16" x1/2" with a 1/4" gap and the Large Body Chassis and Frame Clip - Qty 1 Item # SWC9042-1 has the same measurements as the 464600
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  • Can The Electric Trailer Brake Wiring Cross On The Rear Axle Instead Of The Front Axle?
  • Yes, you can run the 12 Gauge Black Primary Wire # 12-1-1 in the manner that you have described. From the front left brake to the rear left brake, then across the rear axle to the right side rear and front brakes. The brakes will continue to operate properly in this orientation.
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  • Availability of Circuit Testers for Use When Installing Trailer Wiring in Ford F-150
  • Thank you for your purchases from etrailer back in June. You are correct that we do offer trailer wiring kits that come pre-packaged with a basic circuit tester. One such example is the Draw-Tite Wiring Kit # 18252 that fits the 2010 F-150. But no worries! We also offer stand-alone testers like # 40376. I have linked a video showing how the tester can be used to test for signals on trailer wiring. I was able to use your email address to find purchase history for a few different...
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  • Brake Controller Recommendation for a 2012 Ford F-150
  • The best solution I can provide for you would be to replace the integrated controller of your 2014 Ford F-150 with a more reliable aftermarket controller like the P2 # 90885. You will be required to take your truck to a Ford dealer once you complete the replacement of the controller so that you can have the codes on the dash turned off. See attached article. To install the controller you will also need the install adapter part # 22292.
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  • Instructions & Can Other Connectors be Used to Install the Hopkins VueSMART Backup Camera
  • For the most secure connection, when installing the VueSMART RV and Trailer Backup Camera # HM34FR, I do highly recommend using the included heat shrink butt connectors with a heat gun, the Heat Gun with Nozzles # ALL836717. However, if you'd like you can also use butt connectors that crimp such as the Butt Connectors # 05732-2. There are written directions which I've linked for you as well of the VueSMART RV and Trailer Backup Camera # HM34FR.
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  • Which Wire Clip for Use with 1/4 inch Steel
  • For metal that is 1/4 inch thick the Medium Body Chassis Frame Clip part # SWC9041-1 would be what you'd want. This will be a snug enough fit that it will hold well without being too difficult to fit onto the frame.
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  • Using Auxiliary Pin On 7 Way Connector To Charge Boat Battery
  • You can in fact use the 12v accessory circuit on your vehicles 7 way connector to maintain your boat's battery while driving. The 12v accessory circuit is located at the 1'oclock position on your vehicles 7 way. Using # 10-1-1 you would run from the 7 way to the positive terminal on the the boats battery, and the negative would ground to the trailer frame. To note, the 10 gauge wire # 10-1-1 is sold by the foot.
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  • Brake Controller For 2018 VW Tiguan With Factory 4-Flat & Brakes For Trailer With 2,000 lb Axle
  • We can get you set up to tow your jet ski trailer and add electric brakes, but let's go ahead and start with the brake controller for your 2018 VW Tiguan. Since the vehicle already has a factory 4-flat, you would just need to add the 7-way and wiring along with the controller. You are on point with the wiring of your VW being finicky - that's a really good way to put it. The issue is that the brake light wire on a Tiguan is often inaccessible, or can be in different locations, if it...
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  • Can Individual Wires From Deka Jacketed 7-Wire Be Used to Re-Wire Trailer
  • There's no reason at all that you couldn't use the Deka Jacketed 7-Wire # DW04914-1 to re-wire your trailer like you described. The individual wires inside the jacket are 10 and 12 gauge wire which is plenty large enough to span the length of a trailer and the jacket can easily be cut and taken off so you can separate all the wires. My best recommendation in your particular case is to simply go with the most cost-effective option. I have attached a short video review that you can check...
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  • Troubleshooting Trailer Wiring Converter Box On 2012 Dodge Journey
  • If you used a circuit tester like # PTW2993 to check that right turn signal going into the converter and coming out of the converter and it works going in but not coming out, there are really only 2 possible options. The first is that you have a bad ground to your converter and just need to make sure you have a clean metal to metal connection. If your right turn and stop still won't work after cleaning a ground, then the converter is bad and will need to be replaced. If you need to...
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  • Recommended 12 Volt Vent With Wall Mounted Control Switch
  • We do have exactly what you need for a roof vent for your camper, so long as it has the standard 14" x 14" square cut out. What you'll need is a 12 volt vent from Ventline, which comes included with a dog-proof wall mounted control switch (ok it isn't technically dog-proof but will certainly never be confused for a chew toy). You have an option for either White or Smoke in color: - White: Ventline Ventadome Roof Vent with 12V Fan and Wall Switch # V2119-1-533 - Smoke: Ventline Ventadome...
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  • Which Fuse In 2013 Ford F-150 Controls Trailer Turn Signals?
  • Since the trailer connector on your 2013 Ford F-150 is no longer sending power to the turn signal circuits on your trailer you will need to replace fuse # 73. This 20 amp fuse is located in the engine bay fuse box and is what sends power to the trailer turn signals and is what would have blown when you accidently shorted the trailer turn signals. You will want to use a circuit tester like # 40376 to test each side of the fuse to verify if power is making it through or not as some times...
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  • How to Inspect/Test Electric Trailer Brake Magnets
  • For starters, you'll want to give the magnets a good looking over. If you look at the front face of the magnet that rides against the armature surface of the brake drum, you should not see any of the copper wiring that's encased within the magnet. If you do, it's a sure sign that the magnets need replacing. Then, use a multimeter like # PTW1714 and check the wires feeding the magnet while a helper holds the manual brake lever down on your brake controller. You should be seeing at least...
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  • MaxxAir Fan Troubleshooting
  • On the MaxxFan website it says, "Yes, the MAXXFAN and MAXXFAN Plus are designed with dual lifting arms to fully support the lid if installed properly. This makes the lid very sturdy and able to withstand high driving speeds when left open, it also prevents the lid from vibrating and rattling during high winds when the RV is parked. Be sure to fully open the lid when driving so the dual lift arms provide the maximum support for the lid." I would take down the bug screen from the inside...
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  • Wiring for Prodigy P3 Brake Controller on 2004 Workhorse W22 Chassis
  • There isn't a brake controller port that I am aware of on your motorhome built on a 2004 Workhorse W22 chassis, but you can check up under the dash for a bundle of wires; they would have a white tag on them. It would generally be to the far left side under the dash if they are there. If those wires are there you would be able to simply splice in the Tekonsha Prodigy P3 Trailer Brake Controller # 90195. If that bundle of wires is not there you will need the Wiring Kit for 2, 4, 6,...
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  • How To Determine the Cold Side of the Stop Light Switch
  • When installing a brake controller, the only way to determine the cold side of the stop light switch on any vehicle, including your 2012 Kia Sorento, is to use a circuit tester such as the very handy Cordless Circuit Tester # PTW2979 and find the wire that only has voltage when you press the brake pedal. This is quite easy to do you will not have any issues whatsoever. I have also added links to a couple help articles on brake controller installation I strongly recommend checking out.
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  • How to Power 12V Pin on 2019 Ford F-250 Super Duty for Trailer Jack
  • The wiring on your 2019 Ford F-250 Super Duty is a little goofy and it's something that a LOT of people have complained about with the newer Ford pickups. To get power back to your trailer jack you'll have to close your driver's door, depress the brake, start your truck, hold your brake while the truck recognizes the trailer, then click "OK" to get through the notifications that pop up. If you were to route 12V wiring from your battery to he Upfitter Switch then back to the 12V pin on your...
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  • Trailer Brakes Lock Up With All Controller Settings on OEM Brake Controller 2013 Dodge Ram
  • It sounds like you may have one of two issues, unless you had your brakes serviced recently. If the brakes were recently serviced they may have been adjusted too tight which is what may be causing your issue. You can always check your brake adjustment using our article linked below. The first thing may be the brake magnets on the trailer were damaged. I have linked an article below that is very helpful in determining if you have a faulty brake magnet in your system. To test these you...
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  • Troubleshooting 2002 F-250 Towing Horse Trailer with Working Exterior Lights but No Interior Lights
  • It sounds like the interior lights on your trailer are powered through the 12 volt circuit on your Ford's 7-way. So, start by testing to make sure that pin is active. On a standard RV style 7-way, this is located at the 1 o'clock position. I've attached a diagram for visual reference. Using a tester like # PK12741 would be the easiest. You could also simply have a case of corrosion on/in the connectors that is preventing the +12V auxiliary power from reaching the trailer. If this is...
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  • Troubleshooting a Furrion Back Up Camera that Will Not Turn On But Will Work on Another Truck
  • Given the information you provided about the camera working fine when plugged into the cigarette lighter and on another truck, it definitely seems like it is most likely an issue with your truck and the camera not getting enough power. You can use a Circuit Tester Kit # 40376 to check your 7-way pins and the wiring behind your 7-way to try and locate a wiring issue that could be causing this issue. I would start with the 7-way pins, it could be something as simple as giving the pins...
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  • Installing a Brake Controller on a 2002 GMC 6500
  • I do have a solution for you but unfortunately, I don't have information as to the location of the blue brake output signal wire on a 2002 GMC 6500. I called a very popular trailer brake controller manufacturer Tekonsha, and they were also not able to provide this information. Your best option to install a brake controller on the vehicle would be to just run a new wire part # 10-1-1 (per foot) from the brake controller to the 7-way. If the vehicle did not come with a factory 7-way then...
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  • Can I Use the 7 Way Trailer Connector Vehicle Tester on the ETBC7L
  • Yes, you can use the 7 Way Trailer Connector Vehicle Tester # TR20117 but since the # ETBC7L kit does not have a functioning brake controller wire that light will not show up as working; just something that should be noted when testing but it won't stop it from telling you what pins are working otherwise.
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  • Troubleshooting Trailer Turn Signals that Dont Flash When Brakes are Applied
  • I would start by checking the trailer connector on the vehicle with a circuit tester like # 40376 to see if the issue is happening there or is it with the trailer wiring. If you're loosing the turn signal function when the brakes are applied at the trailer connector then the issue is on your tow vehicle. In which case I would have your vehicle checked by a mechanic. If the trailer connector tests fine then the issue is on the trailer. Check the ground connections for each light. ...
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  • Troubleshooting Electric Trailer Brakes That Don't Activate Simultaneously
  • For testing this I recommend a Multimeter # PT29ZR to check the different components of the braking system. You can test the continuity of your wiring from the 7-Way to each individual brake magnet. It can help you identify if there is damage internal to wiring that you cannot see. If that checks out you should test the magnets in the brakes themselves. We have a great Article for this linked below. For your brake magnets each one should have 3.0-3.8 Ohms of resistance. Then to determine...
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  • How to Determine Function of Trailer Wiring
  • The only way to determine the functions of trailer wiring is to use a circuit tester and test each wire; the easiest to use is the Cordless Circuit Tester # PTW2979.
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  • Which Wire Sized Should be Used for Electric Trailer Brakes
  • You should use 10 gauge wire for electric brakes which is pretty much the standard size for electric braking applications because it can handle the amperage better over the long distance from a brake controller to the electric brakes. For a nice duplex cable with two 10 gauge wires you can use # 10-2-1 which is sold by the foot. I have also included a link to our help article on adding electric drum brakes to a trailer.
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  • Troubleshooting Trailer Lights That Only Work When Tow Vehicle Head Lights Are On
  • I would start by checking the ground wire on the vehicle to make sure that it is firmly connected to a dirt and debris free spot on the vehicle's frame. Without knowing which harness you've got connected or what the tow vehicle is that would be the first place I'd recommend trying to look. Typically most wiring issues, especially with plug and play type harnesses, are caused by faulty ground wires.
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  • Troubleshooting Error On Prodigy P2 When Breakaway Battery is Connected
  • It sounds like your breakaway pin isn't pushed all the way in. You can check this with a circuit tester like # 40376 to see if there is power on the wire coming from the breakaway going to the trailer's brakes. If the pin is inserted correctly you should have power going in the switch but not coming out. If you continue to have problems, I would be more than happy to continue to troubleshoot this issue with you.
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  • Brakes Do Not Work On Trailer After Replacing Wire Harness
  • It sounds like you are replaced the wiring harness on your vehicle or on your trailer and still having problems with no brakes. I have attached some helpful articles that explain brake controller installation and troubleshooting you can check out. The problems can run from incorrect harness, wiring, or fuses and relays all the way to the trailer wiring or the brake controller. You will first want to make sure that the wire that leads from the trailer side 7-Way to the trailer brakes...
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  • Does Optronics LED MCL0040RBB Need to be Replaced if Broken
  • If your light is cracked, you will need to replace the fixture with the Optronics LED Clearance or Side Marker Trailer Light w/ Reflector - 1 Diode - Round - Red Lens # MCL0040RBB. Should you also need butt connectors to attach the wiring you can use the Deka Heat Shrink Butt Connectors # DW05744-5.
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  • How To Troubleshoot Electric Trailer Brake Magnets
  • I have attached a helpful article that explains 4 methods for testing your electric brake magnets. You will need a multimeter like part # PT89ZR to check the amperage when testing the magnets. The article explains how to test the magnets while the trailer is connected to the vehicle and also explains how to do bench testing to see if the magnets are working properly or need to be replaced.
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  • Recommendation For Different Locations For Ground Wire
  • Yes that is possible. The main concern with your ground wire is that it is solidly attached to a good ground location. Normally, one of the best and easiest places to mount your ground wire is the vehicle or trailer frame. No matter what, the ground wire needs to be firmly mounted to a clean and corrosion free metal location. Since you may need additional wire for your solution, I recommend our 12 gauge primary wire that you can purchase by the foot, Item # 12-1-1. Good luck...
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  • Converter For Motorcycle/Trike With 6-WAy Separate Lighting & Trailer With Combined Lighting
  • Ok, we can help you out here to get all of the functions working; there isn't an adapter available that is going to do this since your trike has separate lighting and your camper trailer has combined. What you will need is a converter for your trike, and you'll need to cut off the 6-way and wire in a 4-way; here are the parts: - Roadmaster Brite-Lite Wiring Converter # RM-732 - 4-Pole 60" Long Vehicle End # 18002 - Cordless Circuit Tester # PTW2979 You'll need the circuit tester...
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  • Multimeter Recommendation for Testing Voltage Drop of Brake Controller Install
  • You're going to want to use a multimeter like the # PT89ZR which will show exactly what the voltage is on the brake output pin of the 7-way. Otherwise without knowing what the voltage is exactly it's hard to speculate why there would be an unknown potential voltage drop. Measure the voltage near the controller like you did and on the output pin and let me know what's going on. Keep in mind that this is proportional controller so the only way you'll see full voltage on that pin is with...
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  • Troubleshooting 7 Way Wire Functions on a Camper
  • It sounds like your wires are most likely all wired up correctly. If you are wanting to verify that, I recommend the Pollak 7-Way to RV Socket LED Circuit Tester # PK12741. A more likely culprit is probably damaged wiring somewhere along the circuit or possibly some corrosion built up around the running lights pin on the trailers 7-way. If you have a damaged wire you would want to splice in new wires individually for the ones damaged on your 7-way wiring or splice in a jacketed 7-way bundle...
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  • Does Tekonsha Trailer Wiring Circuit Tester Activate Trailer Brakes
  • The Tekonsha Trailer Wiring Circuit Tester # 8010 does send power back to your trailer brakes to make sure the circuit is working correctly. This will apply your trailer brakes at short intervals and will let you know the condition of your wiring. This means that the tester essentially tells you whether or not your brakes are working, however if something is wrong with them mechanically (as in they need to be replaced because or wear) that will need to be determined by physically inspecting...
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  • How to Add 7-Way Wiring to Rear of Flagstaff 5th Wheel to Allow Towing Boat Trailer
  • The 4-pole format of trailer wiring includes only basic lighting signals for stop, tail and turn lights; in order to have trailer brake power you will need to convert the wiring to at least a 5-pole (one more circuit for brakes) or to the popular 7-way format which has circuits for brakes, reverse lights and auxiliary 12V power. An article on wiring is linked for you and this includes details about the circuits found on each type of wiring format. If the taillight wiring in your Flagstaff...
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  • Adding a 7-Way Trailer Connector to a 2008 Toyota Sequoia
  • Since you have the 4-way flat installed, I would recommend you install the brake controller 7 & 4 way installation kit, part # ETBC7. This kit includes all of the extra wires, circuit breakers and connectors needed to complete the installation of a 7-Way at the rear of your Sequoia while still retaining the use of the 4-way flat. The 4-way will plug into the back of the # ETBC7 and there will be 4 wires left to hardwire to the vehicle. White grounds to the vehicle frame. Purple goes...
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  • How To Tell When Tekonsha Trailer Wiring Circuit Tester Internal Battery Is Charged
  • The Tekonsha Trailer Wiring Circuit Tester part # 8010 does have an internal battery that needs to be charged. I have attached a snip from the installation instructions that explains charging the internal battery. The LED on the charger will turn green when the battery is charged. There is not really a set time to charge it but the green light is an indicator of being charged.
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  • 2013 Ford F150 Long Bed Pickup Trailer 12 Volt Power Fuse Location
  • On your 2013 Ford F-150 the are are two things to look at. They are both located in the power distribution center under the hood. Remove the cover and check position #9 that is the relay for the trailer power circuit. The second is position # 21 this is the trailer power relay fuse. It requires a 30 amp fuse. The Tow Ready 7 Way Trailer Connector Vehicle Tester part # TR20117 can help identify when power is present.
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  • Recommended Testing Method to Determine Trailer Wiring Functions
  • Usually a 4-pole trailer connector will have a white wire as ground, green wire for right turn/stop, yellow wire for left turn/stop and brown for both sides' running lights. But since there is no real standard for wire color on trailers (and since colors can sometimes fade/change after exposure to weather) your best and easiest solution is simply to apply 12V power to the wires one at a time to see what function becomes active. You can use a vehicle's 12V battery or a spare - if like...
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  • Wire Gauge for 20 LED Trailer Clearance Lights on 150-Foot Run
  • Twenty (20) individual LED clearance lights that each draw .048-amps at 12-volts will have a total current requirement of less than 1-amp. But a long 150-foot total wiring run will mean some losses. I recommend using dual runs of 10-gauge wire # 10-1-1 to ensure you get the full brightness from all those LED lights.
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  • Creating a Hot Lead from RV to Towed-Trailer Battery
  • You should use 10 gauge wire, item # 10-1-1, and a 40 amp inline circuit breaker, item # PK54540, to install the hot wire in the 6-way connector at the rear of your RV. Using a fuse on the trailer side while not required, would protect your RV form any problems associated with this wire or the battery on the trailer side.
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  • Installing Brake Controller On 2008 Chevrolet Kodiak Motorhome
  • There is no plug-in brake controller wiring harness available for your 2008 Kodiak, so it will have to be hardwired. If you already have a 7-way connector at the rear of your RV, you can use a circuit tester like part # 40376 to locate the stoplight switch under the dash. This wire will only show power when the brake pedal is pressed. This is where the red wire from the brake controller will connect to. The blue wire from the brake controller will then be connected to the pin on...
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  • Discontinued Drawtite I-Command Brake Controller Error Code
  • On the Discontinued Draw-Tite I-command Brake Controller 5535, the manual says the error is the brake controller is "seeing" an overload condition during operation. If it is reading overload without the trailer connected then that means there is a short in the blue trailer feed wire on the vehicle. You will need to check this wire for a short using a circuit tester like # PTW2993, and replace the wire where any issue is found. If you can't find the point along the wire, I recommend...
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  • Locating Brake Switch Wire on 2016 Mazda CX-9
  • To locate the correct brake switch wire on your 2016 Mazda CX-9, you will need to use a circuit tester like # PTW2993 to test each of the 3 wires you mentioned in your question. You are looking for the wire that shows power only when the brake pedal is depressed and not for any other function like turn signals or running lights. I was not able to locate what color this wire might be in your Mazda CX-9, however testing the wires is still the best method as vehicle manufacturers tend to...
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  • Weak Trailer Brakes On Trailer Towed by Ram 3500 or Chevy 2500
  • Which brake controller are you using? What are the years of the trucks? If using factory integrated brake controllers you may need to adjust the gain (same on aftermarket controllers) to increase the output voltage. Trailer brakes work on varying voltages. At 4 to 5 volts that is not quite half of full power. At 12 volts the magnets would be fully energized. Also, where are you testing for voltage? Adjust the power output on the brake controller to the maximum and then have someone fully...
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  • Is Jacketed 2 Wire Resistant to Salt Water
  • The wire that comes with the Jacketed 2 Wire (Brake Wire) - 12 Gauge # 12-2-1 is not tinned but you could tin the ends where you're making your connections if you choose to do so. This wire is also resistant to corrosion from water in general - it doesn't have a special rating for salt water. It is perfectly fine to use on a boat that is being used to offload a boat into the ocean. Some actions you can take to help extend the life of your wiring (and trailer in general) are to use...
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  • Replacement 6-Way to 7-Way Coiled RV Connector for Flat Towing
  • There is a standard wire color to function relation for trailer connectors which I have attached for you but you will want you test each of the wires with a circuit tester like part # 40376 to be sure you are making the correct connections. The 7-Way Round RV Style Trailer Connector part # A7WCB can be used to replace the 6-way on your coiled connector but a better option for you would be to replace the entire harness using the Hopkins Heavy-Duty Coiled Trailer Connector Adapter part #...
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  • Connecting of 7 Way Wiring Harness On 2005 Chevy Express Van To 7 Way Trailer Connector
  • On your 2005 Chevrolet Express Van with the 7 wire trailer harness you will need to use a circuit tester like the Quickee Circuit Tester, # 40376, and test the function of each wire to know where to connect to the 7 wire outlet. I am sending a link with a picture of a 7 way vehicle connector that shows the connections for each specific function. If you need a trailer connector for your vehicle I have the Hopkins Adapter 4 Pole to 7 Pole and 4 Pole, # 37185, which can be used to connect...
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  • Tekonsha Voyager XP Brake Controller Installed On A 2006 GMC Sierra 2500 Not Engaging Brakes
  • There are a few tests you can do first before you go replacing your Tekonsha Voyager XP. In your truck cab sever the blue wire several inches from back of the brake controller, and use a circuit tester # 40376 to check for power on the back of the unit when the brake pedal or the manual override is engaged. If there is power to the controller at idle, then that is indicating that there a problem with the controller and will need to be replaced. You can reconnect the blue wire...
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  • Determining Axle Length for 73 Inch Outside to Outside Frame Trailer
  • Assuming you have an existing axle, the best way to determine the axle you need is by measuring from hub face to hub face. Once you have this measurement you can measure from the center of the leaf spring to the center of the other leaf spring to make sure there is a compatible replacement. If you do not have an existing axle you will need to take in to account the width of the tires and wheels you intend to use as well as the spindle length. Start with the width of your trailer with...
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  • Parts Needed to Install 7-Way and Brake Controller in 1981 Chevy Truck
  • For 7-way wiring you could run from the cab of your truck back to the rear of it we have the jacketed 7-way wiring part # DW04914-1. We don't normally offer wiring for this portion of a vehicle but this would work if you have the 7-way wires present near the cab. Normally in this situation we recommend installing a 4-way like the # 119190KIT which wires to taillight circuits and then converting to a 7-way with the # ETBC7 like you referenced so that you can install a brake controller...
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  • Replacement Parts for a Fan-Tastic Vent Fan 6600R
  • I called my contact at Fan-Tastic Vent and they informed me that there are no longer any replacement parts available for the Fan-Tastic Vent Fan 6600R due to its age. I would first check to make sure none of the wires are pinched and that the lift motor is receiving power by probing the wires with a circuit tester like part # 40376. If it turns out that it is not a pinched wire and the motor is bad then you will need to replace the entire unit. For a direct replacement, I recommend the...
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  • Troubleshooting Electric Drum Brakes That Do Not Grip Despite Functioning Magnets
  • Based on your troubleshooting efforts so far I suggest that you test the trailer brakes without using a vehicle and brake controller; you can test the trailer brakes directly by applying +12V power and ground to the appropriate contacts on the trailer plug. Please refer to the linked photo. A set of jumper cables and 10-gauge wire like # 10-1-1 or # 10-2-1 make it simple enough to "hot wire" the brake circuit with the full power from your vehicle battery or a well-charged spare. If you...
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  • Troubleshooting no Power to Brake Controller on 2005 Ford F-150
  • Thank you for purchasing this brake controller and the wiring adapter from us, and though I was unable to find your order number to know exactly what controller and adapter you purchased from us, I can tell you no additional fuse is needed on a 2005 Ford F-150 with the factory 7-way. I can offer you some troubleshooting tips that may be of use, which I'll proceed with. What you will need to do is check your owner's manual to find where the fuse is for the brake output and ensure that...
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  • Trailer Wiring Circuit Tester Comparison
  • Both the Tekonsha Trailer Wiring Circuit Tester # 8010 and the Hopkins Tow Doctor Trailer End Test Unit # HM50928 are for testing the wiring of your trailer. Both will work with incandescent and LED lights. However, the Hopkins will not display amperage for LED lights. They both connect the same by plugging your trailer's wiring harness into the unit. The Hopkins includes connectors for a 7-blade, a 4-pole, and 6-pole round. The Tekonsha has the 7-blade standard. If you need a...
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  • P3 Brake Control Shows No Trailer Connected Even with Trailer Connected to 2002 Ford F-150
  • A brake controller like the P3 # 90195 senses the brake magnets on the trailer when connected to the truck. It is possible that the blue wire (brake output wire from the controller to the trailer) is broken or missing somewhere so it cannot sense the trailer. To test this adjust the controller to the highest setting. Then have someone sit in the truck cab and fully apply the manual override lever while you test the brake output pin in the 7-Way connector at the back of the truck using...
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  • Troubleshooting Brand New Trailer with Weak Electric Brakes
  • Since the trailer is brand new most likely the issue is that the brake assemblies aren't adjusted properly as this is the most common cause for weak brakes on a new trailer. If the assemblies are self-adjusting they will get tighter with every application of the brakes so you can apply the manual override lever several times and they will get tighter each time. Or you can manually adjust them tighter to get them more sensitive. I have attached a great installation video that you...
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  • Can Trailer Battery for Interior Lights Ground to Frame as Well as Trailer Lighting
  • If you wanted to ground your accessories/lights to the trailer frame then yes you'd want to ground the battery to the trailer frame as well. This would not be an issue if you had your trailer taillights grounded to the trailer frame as well. Everything grounding to the frame would work fine together.
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  • How to Make a 25 foot Long 7-Way Wiring Harness
  • We have what you would need to make a 25 foot long 7-way harness. You would need the part # DW04914-1 which is jacketed 7-way wiring sold by the foot. And then for a connector part # A7WCB.
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  • Adding Charge Line To a 2021 Kia Telluride With Factory 7-Way
  • Yes, you can run a Wire # 10-1-1 from your battery on your 2021 Kia Telluride directly to the auxiliary/charge line on your factory 7-way. I do recommend using a 30 amp. In-Line Circuit Breaker # 38630 to prevent power from overloading the wiring. Since it is a factory installed 7-way you may want to check the fuses on your Telluride to ensure they are good and were not left out from the factory. Your owners manual indicates that there are three 30 amp fuses listed directly for the...
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