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

• Recommended 7-Way and 4-Way Trailer Wiring Connector Compatible with Factory Harness
  For your 2002 Ford F-250, the wiring harness you are seeking with both 7-way and 4-way connectors is the Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 7-Way and 4-Pole Flat Connectors # C55774 or the Reese # 74682. Either of these will connect to your factory wiring harness to give you both of the trailer connectors you seek.
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• 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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• Parts Needed To Add Hopkins 7/4 Pole Connector To a 2020 Ford F-150 With Factory 4-Way
  I have a couple ways you can install the 7- and 4-Pole Trailer Connector Socket # HM40975 on your 2020 Ford F-150 with a 4-way flat factory connector. The first is going to be the easiest but is more costly. You will use the harness from the Curt 7-Way # C56413 and connect to the connector you found. The Curt harness will connect to the factory wiring as seen in the installation video I have linked near the bottom of the page. Otherwise we do have the Hard Wire Connector # 20147 which...
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• Troubleshooting Danger Notification and No LED Light on Curt Echo Brake Controller
  Sine the LED does not light up on your Curt Echo # C51180, that means there's no power getting through to it. Given the fact that the Echo was receiving power and working properly at one point, chances are you're dealing with a poor ground issue. I would start by checking the power and ground circuits on your Ram's trailer wiring. These will be on the 1 o'clock and 7 o'clock positions, as shown in the attached diagram. You can use a 12V probe-style circuit tester, like # PTW2991 to check...
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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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• 2023 Honda Passport Plug-And-Play Style Trailer Wiring Kit Recommendation
  Thanks for reaching out, Robert! The best way to add a plug-and-play style 4-Way/7-Way connector to your 2023 Honda Passport is with the following parts: - Curt T-Connector Vehicle Wiring Harness # CU86FR - 7- and 4-Pole Trailer Connector Socket # HM40975 - No-Drill Mount Bracket, Long # 18136 The Curt wiring kit is a plug-and-play style where the only "splicing" you have to do is ground the white wire to a clean bare metal spot on your frame with the included self-tapping screw....
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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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• 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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• 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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• 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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• 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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• Location of Factory Connector for Trailer Wiring on 2006 Chevy Silverado 1500
  Your truck should have a round connector located above the spare tire for the adapter (part # 118384) to plug into. To locate the connector, you might have to lower the spare tire. The connector is usually zip tied to the rearmost cross member. The connector might have a protective cover over the end of it to keep road debris out of it. Certain models might not have the plug, but the wiring harness should still be there. If this is the case with your vehicle, cut the plug off the end of...
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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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• How to Activate 12-V Feed to 7-Way Trailer Connector on 2015 Ford F-350
  The 12-V feed to the 1:00 pin on the 7-way is protected by 2 fuses in the engine compartment fuse box, so I'd make sure those are in place and not blown first. Look for a 40A fuse in location # 10 and a 25A fuse in location # 90. Some of the lower-level optioned Ford trucks simply don't have those fuse locations wired. If that's the case with your truck, you'll need to run your own feed from the 7-way up to the battery. We offer a kit that includes the wire, circuit breaker and hardware...
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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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• 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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• Installing 7-Way and 4-Way Connectors on a 2015 GMC Acadia
  The Hopkins # HM40975 that you referenced plugs into a US Car Connector (see attached picture). This typically will replace a factory 7-Way on a vehicle so if your 2015 GMC Acadia didn't come with a 7-Way you might not have that connector. If it does exist though it will be located somewhere around the trailer hitch. If you don't have the US Car Connector but you would like fully functioning 7-Way and 4-Way connectors then we do have a solution for you. Simpy install the T-One Vehicle...
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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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• 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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• 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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• 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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