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Expert Answers about Hopkins

  • Replacing Damaged 7-Way Trailer Connector and Wiring on a 2005 Chevy Silverado
  • To replace the 7-Way trailer connector on your 2005 Chevy Silverado with a 7- and 4-Way I recommend # HM40975 and wiring harness # PK11998. To determine how to wire up the harness to the truck wiring you will need to use a circuit tester such as # 3808 and have someone sit in the truck and run through the lighting functions will you test the wires. Then you can wire in the new harness by function. The wire function/colors for the new harness are: Red - Left Turn and Stop White -...
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  • 7-Way and 5-Way Connector Recommendation
  • The closest thing we offer to what you are looking for is the part # HM48470. This will require you to remove your current 7-way and wire this one in it's place. Once installed it will provide you with a 7-way and a 5-way that can be used. Check out the videos I attached as well. Once shows a review video and the other an install video.
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  • Trailer Brake Controller Causes Brake Lights on 1994 Chevy Truck to Come On with Truck Off
  • If you disconnect the red wire from where it is connected to the truck and the problem stops then that indicates a problem along that red wire. The red wire tells the brake controller you are stepping on the brakes but when you use the manual override without the brake pedal it sends voltage on the red wire to light up the brake lights on the truck. If there is a short inside the brake controller that could be why this is happening. You would have to replace the brake controller in that...
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  • What is the AUX Power Pin for on a 7-Way Trailer Connector
  • Some trailers may need an auxiliary power source to power additional 12 volt items on the trailer but this isn't as common as you might think. Now instead of aux power reverse lights are more common on vehicle side trailer connectors (and still not used by all that many trailers). If your trailer does not need aux power and you don't want that circuit live at the connector you could remove that wire from the back of the 7-Way and cap it off with a wire nut, tape it up with electrical...
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  • Troubleshooting Trailer Lights That Go Off When 2011 Dodge Ram Is Put in Reverse
  • It sounds like the wiring on your trailer 7-way connector is wired incorrectly. Try using a circuit tester like part # 3808 and testing each pin on the trailer connector for function. If the pins on the connector are compared to the hands of the clock, the pin at the 1:00 position is the 12-volt accessory feed. This pin should show constant voltage. The pin in the 3:00 position should show voltage when the right turn signal and brake is activated. The pin in the 5:00 position carries the...
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  • Re-Wired Cattle Trailer Lights Go Out When Brakes on 2002 GMC Sierra are Applied
  • Since your truck came with a factory trailer connector I suggest you avoid the hassle and potential for problems by completely skipping the 7-way to 4-pole adapter. You can install Hopkins # 30955 in place of your factory 7-way and this will give you BOTH a 7-way and a 4-pole at the truck - with no adapter needed. Adapters are handy but are not a great solution for the long run. This Hopkins harness plugs in at your existing round connector at the bumper. With the truck being 13-years-old...
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  • Troubleshooting Blinking Light on Agility Brake Controller
  • You don't say if the vehicle is sitting still when you are experiencing this problem. With proportional brake controllers your vehicle must be going from 15 to 20 mph before it will activate. If this occurs when you are going more than 15 to 20 mph, you may have a short in the brake wire. This is usually a result of a dirty or corroded trailer connector on the vehicle or trailer side. Corrosion can build up on the pins and in the backs of connectors where the wires attach. Also while...
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  • Troubleshooting 2003 Chevy Tahoe that 7-Way Stopped Functioning
  • If the trailer wiring fuses of your 2003 Chevy Tahoe are good and the 7-way still isn't working properly the problem is either that there is corrosion on the 7-way that would need to be cleaned off with fine grit sandpaper or the wiring to the connector itself is damaged somewhere between the connector and the vehicle fuse block. Check out the connector, most likely you will either find damaged wires behind the connector or corrosion that needs to be fixed or there is corrosion on the...
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  • Where Does Lower Bar of the Hopkins Tailgate Assist part # 74211 Sit in Relation to Pivot Tube
  • The lower bar of the Hopkins Tailgate Assist part # 74211 that you referenced will end up sitting right at level with the pivot point of the tailgate. If you check out the picture I attached you will see where that part of the assist installs in relation to the hinge of the tailgate.
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  • 7 way Round to 4 Way Flat Adapter Recommendation
  • The 7-way round style of connector that the # 47405 has is the same style that is typically found on tractor trailer type rigs. The issue you may run into is that the taillight circuits of your tractor are separate, meaning that the brake lights and the stop lights are carried on separate circuits. If that is the case just the # 47405 wouldn't work. If this is the case you will want the converter part # 119130 and a male round 7-way part # PK11700.
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  • Troubleshooting Trailer Running Lights Not Functioning After Boat Launch
  • Water and electricity don't mix well so I would imagine the issue you are having with the running lights of your trailer are related to your trailer being submerged in water when you launched your boat. 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. I suspect a blown fuse on the tow vehicle is to blame...
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  • Troubleshooting 7-Way Trailer Connector on 2003 Chevy Tahoe
  • Check that the harness that plugs into the rear of the trailer connector is pushed in all the way. I'd recommend using a circuit tester like part # 40376 on the wiring behind the trailer connector. If you're getting power on the harness but not on the trailer connector, the connector is faulty, damaged or corroded and would need to be replaced with a new connector such as part # HM40975. If you don't see any power on the harness, you'll need to check the fuse box under the hood. The...
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  • Can a Trailer Battery Be Charged through 12 Volt Circuit on Hopkins Coiled 7-Way to 6-Way Adapter
  • Trailer wiring on a vehicle or trailer can provide a maintenance charge only to a 12 volt battery (if it is a regular car type of battery) but the wiring is not heavy enough, nor are most vehicle alternators strong enough, to push back the amperage required to charge up a 12 volt battery. If it is a small breakaway battery then it can charge it up. So as long as the 12 volt circuit is working on the tow vehicle and the matching 12 volt circuit on the trailer side is connected to the...
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  • Can Trailer Breakaway Battery Be Mounted on It's Side
  • If you are using a breakaway kit like the Hopkins Engager Trailer BreakAway Kit # 20099 that features a sealed battery in an enclosure then you can mount it sideways if that is a better mounting solution on your trailer. We do often see trailers with their breakaway battery installed in this way. If your kit does not use a sealed battery or if it does not have a protective case for the battery you might want to check the manufacturer's instructions for any cautions about how that particular...
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  • Troubleshooting Trailer Connector On 2005 Nissan Titan
  • I wouldn't necessarily trust the adapter or the LEDs on it. Remove the adapter, and use a circuit tester like part # 40376 on the pins of the 7-way as each taillight function is activated. Turn on the headlights, and test the pin at the 11:00 position. Then activate the right turn signal and test the pin in the 3:00 position. Turn on the left turn, and test the pin at 9:00. Each pin should make the tester illuminate as its function is activated. Then, plug in the adapter, attach the clip...
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  • 4-Way Mounting Bracket Recommendation for the Hopkins Endurance 4-Way # HM48190
  • The # HM48190 is a pretty large connector that most traditional brackets won't quite fit into, but you could use the magnetic bracket part # 38095. You would just use the bracket to grab just the wires before the 4-way and it would be secured.
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  • Recommended Backup Camera that can be Installed Inline with a Backup Camera and 7-Way Connector
  • Yes, since you already have a 7-way connector, you can tee the Hopkins smart hitch back-up camera # HM50002 into your 2014 Ford F-150 existing trailer wiring. Your 7-way remains active as before. My co-worker had this camera in his 2003 PT Cruiser and it worked great. It had very clear definition on the 3.5-inch color monitor. Take a look at the installation video I included too.
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  • Recommended 7-Way Trailer Wiring Harness For 2004 Porsche Cayenne
  • On your 2004 Porsche Cayenne the connector that would work best would depend on the setup you currently have. If you need the 7-way connector due to the trailer connector and if the trailer has brakes there are a couple of items you will need. If you have a 7-way connector on your Cayenne and need to replace it the Hopkins Endurance Multi-Tow 7-Way RV and 4-Way Flat Trailer Connector, part # HM40950 would work fine for you. If you have no 4-way connector at the back of your Cayenne...
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  • Recommended Adapter To Convert 4-Way To 4-Way And 7-Way Plug On 2002 Toyota Tundra
  • The Pollak 7-Pole and 4-Pole Trailer Connector, part # HM40975-11998 will work with your 2002 Toyota Tundra but since you said you already have a 4-way connector I may have a better solution for you. I recommend the Hopkins Adapter, part # 37185. This adapter plugs into the 4-way at the back of your Tundra, and with additional wiring gives you a 7-way connector. I have attached a link to an installation video for this adapter on a Tundra you can check out. When working with electrical...
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  • Troubleshooting a Blown Fuse Every Time a Trailer is Connected
  • If your taillights keep blowing every time you connect your trailer, it seems to me you have a short in the running light on your trailer. I recommend starting at the trailer connector and check for any corrosion or damaged pins. If there is corrosion, remove the wires from the connector as it could have spread inside the connector. Also, check the vehicle side connector for any corrosion or damaged pins. Fix as needed. If the connectors are clean, follow the running light wire looking...
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  • Troubleshooting Running Lamp Circuit on Trailer Towed by 2011 Ford Super Duty Truck
  • If you haven't done so already, you'll want to use a circuit tester like part # 40376 on the running light pin on your trailer connector, which would be the pin in the 11:00 position. If you get power on that pin when the running lamps on the vehicle is switched on, the problem is in the trailer wiring. You'd need to trace the running lamp circuit on the trailer, looking for pinched or broken wires or loose connections. If you don't get power on that pin, make sure you checked the...
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  • Recommended Tow Bar Wiring For 2007 Jeep Grand Cherokee
  • I called my contact at Hopkins and asked about your 2007 Jeep Grand Cherokee. They told me that you can look on the door jamb of your Jeep for a sticker that should have the manufacture date. If your Jeep was built from January to mid June then it is the early year model and the correct harness is part # HM56206. If you find that it was built after mid-year then the right harness is part # HM56207. If using a supplemental brake system a brake light relay like part # RM-88400 is required. Another...
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  • Base Plate Installation Instructions for 2004 Ford Superduty Truck
  • If your 2004 Ford Truck isn't a Harley Davidson model, I'd recommend the Blue Ox # BX2163 base plates. I don't have an install video to offer, but you can see the install instructions by clicking the provided link. There are many different possibilities for providing taillights on the rear of your vehicle, but using a magnetic mounted taillight kit like part # RM-2120 would be the easiest install. The most important thing you'll need to determine is if the vehicle is capable of being...
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  • Dimensions of the Hopkins Never Fade Rearview Trailer Level
  • I went to our warehouse to get the Hopkins Never Fade rearview trailer level # HM04026 to provide you a couple measurements. The length is 10 inches, width is 1-1/4 inches and it is 3-3/4 inches tall. I included a diagram and short video for you as well.
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  • Upgrading Toyota Tacoma from 4-way Flat to 7-way Round Trailer Connector
  • Sounds like you are looking for a 7-way for a brake controller and a 12v hot lead for your 2008 Toyota Tacoma, so I would recommend the Universal Installation Kit for Trailer Brake Controller, part # ETBC7. This includes everything needed to install the wiring for the 7-way connector, once you have the 4-Way installed. I have included a couple of videos of part # ETBC7 for you to check out. Although we offer many different brake controllers, I would recommend a proportional-type controller...
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  • Would the Hopkins Smart Hitch Backup Camera # HM50002 Interfere with Trailer Brakes
  • No, the 7-way adapter that is included with the Hopkins Smart Hitch Backup Camera # HM50002 that you referenced would not interfere at all with the function of your trailer brake controller and your trailer's brakes. It installs inline with your vehicle 7-way and does not alter any signal paths of the circuits. I attached an install video for this camera for you to check out as well.
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  • How to Power Trailer Taillights Without Being Connected to a Tow Vehicle.
  • The best option I can give you would be to bring with you a 12 volt car battery and run jumper wires from each of the circuits of the trailer connector to the positive side of the battery. Or you could use the # HM50928 in conjunction with the battery to allow you to easily control the power to each of the circuits. This would make things easier, but it is a costly option. To keep the battery charged you would need a battery charger like the part # CTEK56158.
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  • Difficulty Fitting Male And Female Sides Of 6-Way Square Adapter Together
  • The first thing I recommend is to make sure the pins on the # 37995 are not bent and they align before connecting the two harnesses together. If it seems excessively tight or difficult to connect I recommend using some dielectric grease like part # 11755. This may provide enough lubrication to allow these two connectors to slip together a bit easier.
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  • Troubleshooting Trailer and Truck Lighting Problems When Trailer 7-Way is Connected
  • Thank you for providing a thorough description of the truck and trailer lighting issues you're having. The various problems you describe COULD be related to the same issue, corrosion in the trailer connectors, but there may also be multiple things you'll need to attend to. The best way to troubleshoot your concerns is to unplug the trailer from the truck's 7-way and then to test each one individually. Since your RV is used, it's wiring is my prime suspect. Step one for troubleshooting...
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  • Brake Light Relay to Prevent Motorhome Turn Signals Being Overridden By Brake Lamp on Towed Vehicle
  • You'll need to install a Roadmaster Brake Light Relay, part # RM-88400. The purpose of a brake light relay kit is to prevent your towed car's brake signal from overriding the turn signal that comes from your RV. When your towed vehicle is properly wired and connected to your RV, its indicator lights will illuminate as you engage the turn signals in your RV. However, if you have only a four-diode system in place, the turn signal will be overridden by your towed car's brake signal as soon...
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