Plug-N-Tow (R) Vehicle Wiring Harness

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

• 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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• Brake and Turn Signal Lights do Not Work on Boat Trailer
  Since the trailer lights are working with a different vehicle, that would indicate an issue on the truck side. But it could also indicate a problem with the adapter as well. You will want to check to make sure the adapter is pinned out correctly to match the way the trailer and truck are configured. Make sure the trailer connector on the truck is clean and free of corrosion. On a 7-Way corrosion can also build up behind the connectors where the wires attach. Check the owners manual for...
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• Parts Needed to Add a 7-Way Trailer Connector to a 2008 Ford F-150
  Since your 2008 Ford F-150 came with a factory installed 4-Way, you will need to add the 4-Way to 7-Way Adapter, # 37185. The 4 way you have on the truck will plug into the back of this adapter leaving 4 wires to hardwire. The white wire will attach to the truck frame, the purple wire will attach to the reverse light circuit behind one of the tail lights. If reverse lights are not needed on the trailer, this wire can be tapped up and stowed out of the way. For the blue and black wires,...
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• Trailer Turn Signals and Brake Lights Not Working on a Boat Trailer
  If you are getting the correct signals from the truck side trailer connectors, then the problem is on the trailer. There could be a number of issues causing the problem. The easiest to check would be the trailer side connector. With the trailer connected, test the wires right behind the trailer side connector using a circuit tester like # PTW2993. If no signals are coming through, then you know the connector is bad and it will need to be replaced. While you are at the trailer side connector,...
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• Troubleshooting Left Turn/Brake Lamp on Trailer Towed by 2007 Ford F150
  As a first step, you will want to determine if the problem is on the vehicle or in the trailer wiring. Use a circuit tester like part # PTW2993 and test the pin on the trailer connector fed by the yellow wire while the turn signals are activated. This pin should light up with the turn signal and when the brake pedal is pressed. If this pin does light the tester, the problem exists with the trailer wiring. You will need to trace yellow wire that feeds the driver's side turn signal and...
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• Brake Lights and Turn Signals Do Not Work on a Trailer Towed by a 2012 Dodge Durango SXT
  The easiest way to see if the issue is on your trailer or on your 2012 Dodge Durango SXT is to use a circuit tester like # PTW2993 and test the pins on the 4-way connector on your vehicle with the trailer disconnected. Assuming the vehicle was wired properly, you should be able to use the 4-way connector or the 7-way connector. Have someone active the turn signals and brakes as you test each pin on the 4-way connector on your vehicle. I have attached a video of my co-worker demonstrating...
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• Comparing Class III and Class IV Trailer Hitches for a 2008 Ford F-150
  There are going to be several differences between a Class III trailer hitch and a Class IV trailer hitch like Draw-Tite Trailer Hitch, # 41933. One difference is how each attaches to the truck. The Class IV hitch requires more attachment points. I have included a link to the installation details for this hitch below that better illustrates where and how the hitch attaches to the truck. Even though there may be more attachment points, we still have the install difficulty rated at a 3 out...
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• Right Turn Signal and Brake Light Not Working on a 2003 Boat Trailer
  This sounds like a classic bad ground problem. To make sure it is a problem on the trailer and not the vehicle, disconnect the trailer and test the trailer connector on the vehicle. Use a circuit tester like # PTW2993 if needed. Have someone sit in the vehicle and run through the functions. If everything is working on the vehicle connector then that would indicate an issue on the trailer, probably a bad ground. If the trailer connector on the vehicle is not showing the correct signals...
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• Trailer Turn Signals and Brake Lights Stopped Working with 2005 Ford F-150
  The first thing to check is the trailer connector on your 2005 Ford F-150. With the trailer disconnected use a circuit tester such as # PTW2993 to test the vehicle side connector while someone sits in the cab of the truck and activates the turn signals and brake lights. If there is power at the truck side connector, then the problem is on the trailer. Make sure that the truck and trailer side connectors are clean and free of corrosion inside where the wires attach and outside on the pins....
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• Wiring Harness For a 2004 Ford F-150 New Body Without Factory Tow Package
  For your 2004 Ford F-150 new body, I would recommend using the Tow Ready Custom Fit Wiring Harness, # 118247. This wiring harness will plug into a connector that is located along the drivers side frame rail behind the back bumper and does not require any splicing. I have attached the installation instructions that show where the vehicle side connector is located and where to connect the relay. I have also added a photo showing the location of the vehicle side connector For a smooth factory...
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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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• 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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• Availability of 4-Flat Trailer Wiring for a 2006 Ford F-150
  If your 2006 Ford F-150 has a factory tow package, the Hopkins Custom Fit Vehicle Wiring, # 40185, that you referenced is the correct harness. If your truck does not have a factory tow package, you will need Draw-Tite Wiring, # 18252. This is a hardwire 4-Flat. You will need access to the taillight wiring. The yellow wire is left turn and stop. The brown wire is running lights. The green wire is right turn and stop. The white wire is ground. If you just need to replace a broken 4-Way,...
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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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• 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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• 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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• 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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• Running Lights Work But Brake Lights and Turn Signals Do Not Work on Coleman Camper
  The best way to start troubleshooting your truck and trailer is to disconnect the two and test each one separately. If you have access to a different tow vehicle or trailer you can test using one of these to isolate the problem to either your truck or camper. Inspect both the vehicle and trailer connectors for signs of dirt, discoloration or corrosion. Even very slight greenish or whitish discoloration on the connectors can interfere with signal transmission. You can try cleaning the...
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• Replacement 4-Way Recommendation for a 2006 Ford F-150
  The Hopkins 4-way part # 40185 has been confirmed as a fit for your 2006 Ford F-150 and would work well for you. It has a ground wire built into the harness connectors so it would not require the use of an additional ground wire.
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• Ford F150 Trailer Wiring Harness for a Trailer with Surge Brakes
  If you do not have a working four way on your 2008 Ford F150 then you can use the item you selected, # 30185, for the four-way connector. If you have a working 4-way connector you will not need the part # 40185 wiring harness. In either case you will need to wire a 7-way connector from the four-way connector. We have adapters for this purpose, part # V30606 or part # 30717. With these adapters you will plug the 4-way from your truck to the 4-way on the back of the adapter and then hard...
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• Trailer Running Lights Do Not Work When Connected to a Honda CR-V
  So it sounds like you are using an adapter like # 37185 or something similar. You need to make sure the adapter is grounded to the vehicle frame otherwise it will not work properly. It could also be a ground issue on the trailer. Ground problems normally show up when there is more draw on a system such as when you have the running lights on and then use another function like a turn signal or brake light. Make sure that the vehicle side and trailer side connectors are clean and free of...
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• Is The Plug-N-Tow (R) Wiring Harness # 40185 Compatible With a 2008 Ford F-150 XL No Tow Package
  Yes, the Plug-N-Tow (R) Vehicle Wiring Harness # 40185 will fit and work on your 2008 Ford F-150 XL with the 4.2L engine and no factory tow package. The Mounting Brackets # 18140 and # 18144 will allow you to secure your 4-way to the receiver cross tube. This will keep the connector protected from road debris and prevent you from having to drill into the receiver or your bumper.
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• Left Turn Signal Not Working on 2012 Ford F-150 4-Way Trailer Connector All Other Functions Work
  You may have a bad relay in your 2012 Ford F-150. Under the hood in the power distribution box check the relay in location 37. The easiest way to see if a relay is bad is to use a known good one in its place. You may have to get this relay from a Ford dealer.
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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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