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

• 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...
  view full answer...
  
• 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.
  view full answer...
  
• 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...
  view full answer...
• 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.
  view full answer...
  
• 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...
  view full answer...
• 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...
  view full answer...
  
• 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...
  view full answer...
  
• 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.
  view full answer...
• 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.
  view full answer...
  
• 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...
  view full answer...
• 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,...
  view full answer...
• 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...
  view full answer...
• 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...
  view full answer...
  
• 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....
  view full answer...
• 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...
  view full answer...
• 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.
  view full answer...
• 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...
  view full answer...
  
• All LED Lights on Trailer Work Except Running Lights When Hooked To 2008 Chevrolet Silverado
  There are a few possibilities and things you will need to check on your trailer and your vehicle. You will want to start by checking the ground wires on the lights, make sure each light has a good ground connection to clean metal surface. Then, you will want to check the wiring on the trailer, start at the 4-way connector and visually inspect the wires for any cut or exposed wiring. If you find cut or exposed wiring where the protective coating on the wiring is missing, you will want...
  view full answer...
• 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...
  view full answer...
  
• 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...
  view full answer...
• Does Hopkins 7-Way # HM40975 Fit 2017 Ford Explorer
  The Hopkins trailer wiring 7-way part # HM40975 that you referenced is a fit for your 2017 Ford Explorer and will attach directly to the wiring of the vehicle without any additional wiring. Basically it plugs right in to the round connector behind your rear bumper and you'd be set.
  view full answer...
• Can a 2nd 4-Way Flat Connector Be Added To a 2024 Nissan Frontier ?
  I have a couple options for you since I do not know what you already have on your 2024 Nissan Frontier. First if you already have the factory tow package with a connector like the # HM40975 built into the bumper you can simply use the Wiring Harness # C55384 which will tee in line behind the connector. If you already have a single 4-way flat connector, you could simply splice in a 2nd Connector # 118001. This particular harness has 48" long wires allowing you to place it somewhere else...
  view full answer...
• Recommended Trailer Connector For 2014 Infiniti QX80
  I called my contact at Hopkins and they said there should be a wiring connector located behind the rear bumper that a trailer connector can be attached to. I have attached a photo you can check out that may help you be able to identify the connector you would look for. The trailer connector we offer is part # HM40975. This comes with a bracket to attach the connector on your vehicle. When installed this will give you a working 7-way and a working 4-way trailer connector. You can use...
  view full answer...
  
• Parts Needed to Install 7-Way Traile Wiring Connector on 2011 Jeep Grand Cherokee
  To install a 7-way on your 2011 Jeep Grand Cherokee that does not have the tow package you'll need to first start with a 4-way like part # 118425. Now if your trailer does not have brakes all you would need is the part # 37185 as an adapter to convert the 4-way to a 7-way. If you do have trailer brakes you would need the # ETBC7 instead of the # 37185 and a brake controller. This kit comes with everything needed to wire up the 7-way and install a brake controller. For a brake controller...
  view full answer...

Do you have a question about this Custom Fit Vehicle Wiring?