See what our Experts say about this Hopkins Custom Fit Vehicle Wiring

• Location of Factory Wiring Connector for 2021 Ford Explorer Limited
  Hello Ken; what wiring harness are you trying to install? Do you have the factory tow package on your 2021 Ford Explorer? If you don't have the factory tow package there won't be a wiring connector at the rear of the vehicle. If you have the factory tow package there will be a plug behind the bumper that attaches to the # HM40975. If you do not have the factory tow package you need to install the Curt 4-way # C56093 which plugs into the connection points in the rear cargo area as seen...
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• How to Activate the Factory Trailer Towing Package on a 2000 Chevy Silverado
  The wiring will already be run on your 2000 Chevy Silverado. There will be 1 of 2 wiring situations on your truck. The wiring for the 7-Way will be located above the spare tire. If it is just bare wires with no plug, you will need to hard wire one in. The harness we have for this wiring situation is Pollak 7-Pole, RV-Style Trailer Connector Socket w/ Wiring Harness and Mounting Bracket, # PK11898. If your truck has a plug, then you will need to use a connector like the Replacement Multi-Tow...
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• 7-Way Trailer Wiring Connector Recommendation for 2011 Volkswagen Tiguan with Blue Connector
  The connector you found on your 2011 Volkswagen Tiguan is great news. That is a standard 7-way connector plug which means to install trailer wiring all you'd need is the # HM40975 which plug connect right to that and give you both a 4-way and a 7-way. This install is just a matter of plugging the connector in and does not require any additional wiring.
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• Adding 7-Way Trailer Connector to 2008 Honda Ridgeline
  If your 2008 Honda Ridgeline came with a factory installed 7-Way trailer connector it is possible that # HM40975 will fit. You need to look at the wiring harness that plugs into the back of the factory 7-Way. If it looks the same as the back of # HM40975, see picture, then you can use it. If your Ridgeline did not come with a 7-Way then to add one you will start by installing a 4-Way (unless the truck already has one) using # 118400. Then you will need to install 4- and 7-Way installation...
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• Replacement 7-Way and 4-Way Connector Bracket for 2008 Ford F-250
  To replace just the mounting bracket for the factory 7-Way/4-Way connector on your 2008 Ford F-250 the Pollak # HM40978 will work perfectly. This isn't an exact OEM replacement but it will fit with the existing connector and mount beneath the bumper just like the one you have. If you do happen to also need the connector itself the Hopkins 7- and 4-Pole Trailer Connector Socket # HM40975 that you were looking at will indeed plug right into the factory US Car connector port under the truck....
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• 7-Way Wiring Configuration for Slide-In Truck Camper
  Your slide-in truck camper does not have electric brakes so the blue brake circuit wire from its 7-way connector is not used. All other lighting functions as well as 12V auxiliary power will be maintained on the other circuits. Please refer to the linked photo for the standard wiring/function configuration for RV-style 7-way connectors.
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• Is There a Difference Between Hopkins 7 and 4-Way Kits 40974 and 40975
  Basically they are the same connector with just a slightly different part number. We carry the part # HM40975 and if you ordered the 40974 from someone else (not recommended haha) you'd get the same thing which just a different part number on the box. I attached an install video for this kit for you to check out as well.
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• Recommended Trailer Hitch for a 2020 Ford Ranger
  The trailer hitch that I recommend for a 2020 Ford Ranger is the Curt Trailer Hitch Receiver part # C13417 which is a custom bolt-on fit that does not require any cutting or drilling. The process should actually only take you around 20 to 40 minutes. I have attached an install photo for you as well. For a trailer wiring harness, the T-One Vehicle Wiring Harness part # 22124 is your best option as it does not require any splicing therefore is almost entirely plug and play. I also recommend...
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• 7 and 4-Way Trailer Wiring Connector Recommendation for 2015 Volkswagen Tiguan
  The connector you sent in a picture of is the standard 7-way connector that the Hopkins part # HM40975 is designed to fit. If you plug the # HM40975 into that connector you'll have both a 7 and 4-way trailer wiring connector active.
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• Installing Trailer Wiring and Brake Controller on a 2018 Chevy Express 3500
  I'm not sure what that 8-pin plug on your daughter's 2018 Chevy Express Van 3500 is, but I can say that is definitely not something used for trailer wiring. Since the Express Van didn't come with the factory tow package 7-Way you'll want to look for a frame pocket on the driver side rear left corner of the frame for a seven-wire harness with the connector that you should be able to install wiring with a US round connection, like the Hopkins # HM40975, to. If you can't find that wiring...
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• Installing a 7-Way Trailer Connector on a 2013 Ford E-250 Van
  I checked with Tow Ready about 7-Way connector # 118261 and it is not a confirmed fit for the 2013 Ford E-250 van. Since there are no other options and since you have some factory wiring already, I recommend using 4 and 7-Way connector # HM40975 with harness # PK11998. You will need to test the wiring on the vehicle end with a circuit tester such as # PTW2993 to determine the functions. Then you can install the harness accordingly: Red - Left Turn and Stop White - Ground Blue - Electric...
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• 7-Way Wiring Harness Installation on a 2004 1500 Chevrolet Silverado
  You can use the Pollak 7- and 4-Pole Trailer Connector Socket, item # HM40975, if you are replacing an existing 7-way connector on the rear of your 2004 Chevy Pickup. If you need to install the 7-Way connector for the first time the factory connection point is going to be on the left side of the vehicle above the spare tire. If there is a plug on the end of the wiring harness located above the spare tire, it will simply plug into the rear of the HM40975. If the harness ends in bare wires,...
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• Trailer Hitch and Wiring for a 2020 GMC Acadia
  We have everything that you need to start towing with your 2020 GMC Acadia! I recommend using the Draw-Tite Trailer Hitch # 76023 because it mounts behind the rear bumper and has a very clean look with the lower panel removed. Then for wiring I recommend pairing the T-One # 118276 with the Hopkins # HM40975 which gives you a plug and play wiring kit with both 4-Way and 7-Way connectors. I have linked installation videos of the trailer hitch and wiring on a 2019 Acadia that you can reference. To...
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• Parts Needed to Add a Brake Controller on a 2013 Jeep Grand Cherokee With or Without the Tow Package
  Since you don't have the trailer towing package on your 2013 Jeep Grand Cherokee you do need to start off by installing a 4-Way connector. I recommend the Tekonsha T-One # 118425 as we have found Tekonsha to be one of the most reliable wiring companies that we carry. To have 7-Way and 4-Way connectors on your Jeep you also need the Universal Wiring Kit # ETBC7. This connects to the T-One and give you both connections that you need. It also includes everything you need for the 7-Way to...
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• Trailer Wiring for 2015 Jeep Grand Cherokee
  Hi Dave; the answer to your question depends on the plug you're looking at. More than likely it is a round plug like the one seen below so all you need is the # HM40975. If it is a rectangular plug that matches the other picture below you need the # PK11933 and # HM40975. It is also worth noting that you may have to take it to the dealer to activate the tow package circuit.
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• Recommended 7 Way and 4 Way Harness for 2004 Ford F-150
  It sounds like you already have the factory tow package 7-way on your 2004 Ford F-150; if so you would be able to easily install a connector with a 4-way flat and 7-way. I recommend the Reese Multi-Plug Wiring Harness # 74682, which will simply plug into the factory 7-way socket on your truck and give you those connections. I've added a link to a video review of this product for you to check out as well.
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• Wiring For 7-Way Connector on 2004 Chevrolet Silverado 2500
  On your 2004 Chevrolet Silverado 2500 the factory wires should be light green, dark green, blue, yellow, red, brown, and black. The functions of those wires should be as follows: light green - reverse lights dark green - right turn/brake blue - electric trailer brakes yellow - left turn/brake red - 12-volt power brown - running lights black - ground I would also recommend testing the functions of your wires with a circuit tester, part # PTW2993, to verify the function of the wires on...
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• Will Hopkins 7- and 4-Pole Trailer Connector Socket Fit 2024 Ford Bronco?
  Hello Tim, thanks for reaching out. The Hopkins # HM40975 has a standard USCAR connection on the back. As long as this "adapter" you are referring to is this same connector (pictured below), the # HM40975 will work for you with no additional parts needed. If your adapter is not the USCAR connector just let me know or even email me a picture and I am happy to take a look and get back to you.
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• Troubleshooting Electric Trailer Brake System on Trailer Towed by Chevy 2500 Series Truck
  Discovering why the trailer brakes are not getting power will be a process of elimination. I am not aware of what you have and have not checked, so I will describe the whole troubleshoot process. Start with the brake controller itself. Is it properly adjusted and leveled (if necessary) according to the instructions? Is it getting power? To determine if the controller is receiving power, you can use a circuit tester like part # PTW2993 on the black wire that feeds the controller to ensure...
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• How to Identify the Wire Functions of Trailer Wiring on a 2002 GMC Sierra
  I can help you determine the functions of the wires in the bundle you sent in a picture of by testing them with a circuit tester like part # PTW2993 but we don't have a way to identify them just based on color. So have a buddy apply the various taillight functions of your truck while you probe all of the wire cores with the tester and you'll be able to know for sure the functions.
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• Trailer Function Fuse Locations on 2016 Dodge Ram 3500
  There is no relay switch for your 2016 Ram 3500. I have attached a diagram of the fuse box. Here are the fuse's that control the towing functions on your truck. \F11 (30 amp pink) - Integrated Trailer Brake Module F28 (20 amp blue) - Trailer Backup Lights F30 (30 amp pink) - Trailer Tow Receptacle F29 (20 amp blue) - Trailer Parking Lights F53 (20 amp yellow micro fuse) - Trailer Tow L Turn/Stop F81 (20 amp yellow micro fuse) - Trailer Tow R Turn/Stop If you are in need of fuses I recommend...
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• Replacement 4-Way and 7-Way for 2004 Ford F-150
  Hey Denzil! I have two possible options for you. If you think it is just your factory connector that's bad you can replace what you have with the 7- and 4-Pole Trailer Connector Socket # HM40975. However, if you want to go this route I would test the wires running into your existing connector and see if they are working. Have you checked the relay/fuses as well? You might not even need a new wiring harness if you find they're bad and swap them out. If you find that the factory wiring is...
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• Troubleshooting GMC Truck that Left Turn Signal on 7-Way Stopped Functioning
  Since you have isolated the problem down to the left turn signal on the 7-way on your vehicle the problem is most likely a blown fuse under the hood of your 2006 GMC Sierra 3500. GM vehicles tend to blow fuses easier than the other manufacturers. Check the fuse box under the hood of your engine on the driver side for the trailer related circuits and replace as needed. I attached a couple help articles for you to check out as well.
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• Is the 7- and 4-Pole Trailer Connector Socket a Fit for Ford Trucks
  The 7-Pole and 4-Pole Trailer Connector Sockets w/ Mounting Bracket and Wiring # HM40975-11998 is a hard wire application, as you can see in the linked installation video we made of this being put on a 2008 Ford F-250. If you only need to connect the plug, which is 7- and 4-Pole Trailer Connector Socket # HM40975, that is a direct replacement for many different years, makes and models of Ford trucks with a factory 7-way; for example it is a fit for a 2018 Ford F-150. If you let me know...
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