Plug-N-Tow (R) Vehicle Wiring Harness

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

• Replacing Factory 4-Way on 2006 Ford F-150 with 4-Way/7-Way Connector
  Yes! The Hopkins Plug-N-Tow # 40185 is a plug and play solution for replacing the factory 4-Way on your 2006 Ford F-150. To add a 7-Way/4-Way connector you would then need the Hopkins # 37185. This connects directly to the 4-Way and then has additional wires that you can connect to wiring run to the rear of your pickup for it to be fully functional. You can mount the Hopkins connector with part # C57202 to avoid drilling into your trailer hitch. If you want to permanently install this...
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• Recommended 4-Way Harness and 4-Way to 7-Way Adapter For 2008 Ford F-150
  For your 2008 Ford F-150, I recommend the Hopkins Plug-N-Tow (R) Vehicle Wiring Harness # 40185 and then use # 37185 to give you the additional wiring features. I recommend using # 10-2-1 for wiring sold by the foot. This will allow you to add a brake controller like # 90195 to your vehicle using wiring harness # 3035-P. There should be a blue (brake) and orange or red (12V) wire at the end of the drivers side frame rail for easy connection. I've attached a video to assist. You may...
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• Ford F-150 STX 4-Way Trailer Wiring Harness Installation
  Wiring your 2007 Ford F-150 STX for towing a trailer with a 4-Way flat connector should not be too hard. If you look under the truck along the inside of the driver's side frame rail, you may see a connector that has wires running to it. If so, use a circuit tester, item # PTW2993 if needed, and make sure the trailer lighting functions are working to this connector. If the circuits are live to this connector, then the Plug-N-Tow (TM) Vehicle Wiring Harness, item # 40185, will work on your...
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• Troubleshooting 2005 Ford F-150 Taillights Not Functioning After Trailer Wiring Install
  The Plug-N-Tow # 40185 that you referenced has been confirmed as a fit for your 2005 Ford F-150 so if installed properly it should work just fine. Normally when what you described happens the problem is that the wiring harness just isn't making a good connection and would just need to be double checked that it is plugged in properly. Since you were having issues with your trailer wiring prior the problem could be something else related to the lighting of the truck. However, typically...
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• Troubleshooting 2018 Ford F-150 W/ 4-way Connector That Has Power But Doesn't Power Trailer Lights
  Since your 2008 Ford F-150 has a 4-way connector and you tested it and it has power but your boat trailer lights are not working I would check that the connector does not have corrosion/debris on or in it causing a connection issue. It sounds like your truck came with the factory 4-way connector, and if that is the case then it does not have the correct connector to just replace the connector with a 7-way. Instead you would need to use the # 37185 which will plug into your factory 4-way...
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• Trailer Left Turn and Tail Light Not Working on a Trailer Towed by a 2006 Ford F-150
  What I think may be happening is there is the absence of a relay that will not allow certain functions to work on the trailer lights if the load on the system is great enough. I would consult the owners manual, find the location of any relays/fuses associated with the trailer wiring, and make sure they are in good working order or add the ones that may be missing. Another issue could be a faulty ground somewhere since your ground test did get it to partially work. You will want to check...
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• Parts Needed to Add 7 Way Trailer Connector to 2007 Ford F-150 with 4 Way
  In order to add a 7 way to your 2007 Ford F-150, you can utilize the existing 4 way connector like the # 40185, but there will be some additional wiring that you'll need to run in order to add it and have a functional brake controller. You will need to run a wires from the 7 way to the battery for a 12v power supply and into the cab of the truck for the brake controller wire. You'll want to use the # ETBC7 which comes with everything you need to install this including breakers and wiring;...
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• Towing Capacities, Trailer Hitch and Wiring for 2005 Ford F-150 SuperCab 4WD With 5.4L V8
  According to Ford, a 2005 Ford F-150 SuperCab with four-wheel drive and a 5.4L V8 will have a capacity between 7,300 lbs and 9,300 lbs depending on what wheelbase it has and what axle ratio it has. I recommend finding what yours is and looking in your owner's manual, which will have these capacities. Then for a trailer hitch you can add the Curt Trailer Hitch Receiver # C14357 for a heavy duty, Class IV hitch and if you need to add a wiring harness the Plug-N-Tow (R) Vehicle Wiring Harness...
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• No Left Hand Turn Signal On a 2006 Ford F-150
  If you don't have power on the left hand stop/turn signal pin on the trailer connector for your 2006 Ford F-150 then you likely either have a blown fuse or a loose/severed wire. The fuse for this circuit is located in the engine bay fuse box, slot 42 which is a 10 amp fuse. If this fuse is good then check the wires at the back of the trailer connector and work your way back to see if any breaks are present. If you still can't find anything wrong then you may just need to replace the...
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• Which Hitch Will Fit a 2005 Ford F-150 With the Flare Sides and Short Bed
  I can confirm that the Curt Trailer Hitch Receiver - Custom Fit - Class III - 2" # C13352 will fit on your 2005 Ford F-150 with the short bed and Flare-sides. I've added a photo that we have on the product page of this hitch installed on the same truck for you to check out. If you also need a wiring harness for this truck, I recommend using the Hopkins Plug-N-Tow # 40185, which will plug into the US Car Connector port under the vehicle on the driver's side and allow you to have a 4 way...
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• Trailer Lights Not Fully Working on a Trailer Towed by a 2007 Ford F-150 with Factory Tow Package
  It does sound like a ground problem. Most wiring issues are due to a bad ground connection. But first, I do recommend checking the trailer and vehicle side connectors for dirt or corrosion in and behind the plugs. That can cause the problem as well and it is the easiest thing to check. After that, if you still have issues, start checking all of the grounds starting with the truck side trailer connector and working back to the tail lights on the trailer. The grounds should all be connected...
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• Troubleshooting Malfunctioning Turn Signals on Utility Trailer Towed by 2006 Chevy Silverado
  The first thing you will need to do is to test the 4-pole connector on the truck with a circuit tester like # PTW2993. This will tell you if the wiring problem exists on the truck or on the vehicle itself. The pins on the connector fed by the yellow and green wires should light up your tester when the right turn, left turn and brake lights are activated. If you do not get any signal on the right or left turn pins, you most likely have a blown fuse. Check the fuse box under the hood. If...
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• Parts Needed to Install a 7-Way in a 2008 Ford F-150
  You will need to start with a 4-way (if you do not have one). For that you would want the # 40185. 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 # 3035-p and the # 37185 and a brake controller. The brake output circuit is ran to the truck frame rail where you can easily complete it to the blue wire of the 37185. Check out the FAQ article I attached on this...
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• Hitch Recommendation for 2005 Ford F-150 Long Bed
  The Draw-Tite Class III 2 Inch Hitch, part # 41549, that you have referenced will fit your 2005 Ford F-150 long bed. This hitch has a gross towing weight capacity of 6,000 lbs and a tongue weight capacity of 600 lbs. I am including a link to the installation instructions on the Draw-Tite hitch. The # 51020 hitch is listed as a Pro Series hitch that fits 1997 to 2004 Ford F-150, so it is not designed for your 2005 vehicle. If you will be towing with this hitch I would also recommend the...
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• Installing a 7-Way on a 2006 Ford F-150
  I do have a solution for you to install a 7-Way connector on your 2006 Ford F-150 but, as you stated, both the Tekonsha # 118247 and the # 118242 are not compatible. If you have the US Car Connector at the rear of your F-150 then you can simply install the Reese # 74682. If, however, you do not already have a 7-Way that you are trying to replace you will need to install the Hopkins Plug-N-Tow # 40185 as well as the Universal Wiring Kit # ETBC7. The # ETBC7 will plug into the Hopkins...
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• Blown Fuse & Relay with New Utility Trailer Running Lights
  One possibility is that the running lights on the new trailer are simply drawing too much current and are blowing the fuses. Trailers can be equipped with either high-efficiency LED lights or standard incandescent bulbs, which draw about 10 times the power. If the new trailer has many more running lights than the boat trailer, and/or if they are incandescent types, then they may be overloading the vehicle wiring. It is also possible that the running light wiring is pinched, has a bare...
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• Boat Trailer Causes Trailer Brake and Trailer Turn Signal Fuses to Blow
  There are a couple of possible reasons the trailer brake and turn signal fuses have been blowing. First, you want to make sure you unplug your trailer's 4-Way connector from your vehicle's connector before you back your trailer into the water. Unplugging these connectors can help protect the light circuits from the water. It is best to unplug the connectors a couple of minutes before you back your trailer into the water. If you already unplug your trailer connector before backing into...
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• Troubleshooting 2013 Ford F-150 Trailer Wiring that Blinkers Stopped Working
  Sounds like you may have some blown fuses under the hood of your 2013 Ford F-150. Check the fuse box for trailer wiring fuse locations and replace as necessary as it sounds like the turn signal circuit fuses have blown. This circuit most likely blew from a short circuit on your trailer wiring. Before you reconnect your trailer wiring I would check the wiring for the turn signals and fix any cut or exposed wire on the circuit that could be causing the short.
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• Installing a Trailer Wiring Harness on a 2007 Ford F-150 with No Factory Connector
  The 2007 Ford F-150 either came equipped, from the factory, with a 7-way trailer connector or none at all. Since you don't have a trailer connector at all on yours you'll need to start by adding a 4-way connector like the Hopkins Plug-N-Tow, part # 40185. It plugs right into the truck's wiring behind the rear bumper. If the trailer you'll be towing has brakes, or you just want the 7-way to be fully functioning, you can then use our adapter kit, part # ETBC7, to convert the 4-way to a...
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• Trailer Brake and Turn Signals Not Working When 7-Way Connector Plugged into 2011 Ford F-150
  I would recommend checking the fuse box in your friends F-150 to make sure it has the fuses/relays installed for the trailer stop and turn lights. I looked up a fuse box diagram for a 2011 F-150 and it looked like the trailer tow left stop/turn relay is at location 37 and the trailer tow right stop/turn relay is at location 38. You will want to check the legend in the fuse box of your friend's vehicle to make sure those are the correct locations. I would also recommend using a circuit...
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• Getting Reverse Lights to Work on a 2012 Nitro Z-9 Boat Trailer Towed by a 2006 Ford F-150
  Many trailers actually do not have reverse lights but if yours does, you will want to check the center pin on the 7-Way connector on your truck to see if it is working. Use a circuit tester like # 3808 if needed to test the pin. If this pin does not show power when the vehicle is in reverse, then you will need to route a wire to the reverse light circuit on the truck to get it to work. It is also possible that you will need to check the fuse on the truck related to the reverse light circuit...
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• What to Test When There is no Power to a Vehicles 7 Way or 4 Flat
  The fuses are typically the place I start when troubleshooting a plug with no power, but as you have completely replaced your fuse box, that is a bit of a moot point. What is most likely causing the lack of power is damage to one or more wires. Using a tester, like the Circuit Tester # PTW2993, you will need to test the pins on the plug. If you have a 7 Way connection, the 2 o'clock position will be your 12-volt power, the 3 o'clock position will be the right turn signal and right brake...
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• Will The Tow Package Vehicle Wiring Harness with 7-Way Trailer Connector Fit My 2005 Ford F-150
  The Tow Package Vehicle Wiring Harness with 7-Way Trailer Connector for the 2004 F-150, item # 118247, will not work on the 2005 model year Ford F-150. There was a were changes for the 2005 model year and the wiring package was changed on the Ford Trucks. To wire your vehicle for a 7-way connector you will need a 4-way connector first. If your truck has a factory 4- way connector then you will be able to use our Adapter 4 Pole to 7 Pole and 4 Pole, item # 37185, and splice into the vehicle...
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• Troubleshooting Tail Lights Not Working When Brakes are Applied on a Boat Trailer
  It sounds like you have a ground issue on your trailer with new lights. It sounds like when the lights are drawing their maximum amperage (when the brake lights are on) the draw is too much and it is shorting out the lights. I would check the wiring for the lights, especially the ground wires, for loose wiring or not being grounded to a clean surface and fix as necessary. If the grounds are good, the other potential problem is that you might be using too many lights on your boat trailer,...
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