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Expert Answers about Wiring


  • Replacing 7-Way Trailer Connector and Wiring Harness of 2007 Silverado Classic
  • Wow, that's a new one! At least it wasn't your homework! The # HM40975 7-way/4-pole you mentioned would be an excellent choice. Since some of the wiring is damaged, you'll also need a # PK11998 pigtail. Wire the pigtail into the what's left of the original wiring harness. Here's how the pigtail would wire up to the existing wiring: Red pigtail wire to yellow vehicle wiring harness wire-left turn/brake White pigtail wire grounds to white harness wire-ground Blue pigtail wire to blue harness...
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  • Trailer Wiring Harness With Tinned Wire
  • While tinned wiring is the norm when it comes to interior wiring on boats, boat trailers see a minimal amount of water compared to the actual boats. They do use a tin coating on the pins that are the parts of a wiring harness like the Wesbar 5-Pole Flat Connector # A40W5B since those are most exposed to moisture, but since the actual wiring is rarely exposed to water I'm guessing that's why they don't go the extra mile when it comes to using that wiring within the harnesses. As far as...
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  • Replacement Coiled Section for Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit
  • In order to replace the umbilical cord on the Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit part # RM-15267 you'll need the Roadmaster 7-Wire to 6-Wire Flexo-Coil Kit part # RM-146-7. It does however come with new mounting brackets as well.
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  • How to Replace a 5 Pole Flat Wiring Harness That Has 7 Wires
  • I have a solution for you, but we do not have the exact replacement for this wiring harness. Instead, I recommend using the 5-Pole Flat Connector # A40W5B to replace your old connector and then combine one of the wiring functions on the old harness into one wire on the new harness. You'll want to test the functions of your existing wires but my best guess is that the way this is currently wired your blinkers have individual ground wires and that harness has no reverse light wired in- these...
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  • Recommended Replacement Wiring for 1996 Dutchman Duck with Obsolete Wiring Harness
  • Your best bet is to re-wire the trailer with a new 4-pole connector to match what is on your vehicle. You can use a junction box like # 38656 to join the existing trailer wiring (4 of the 6 wires, that is) to a new trailer-side 4-pole harness such as # W787268 from Wesbar, which is 8-feet long. You will need ring terminals, 8 of them, such as # 44-5310A. The leads from the trailer and the new harness will be joined in the junction box using the ring terminals. You will want to match the...
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  • Recommendation on Wiring a 2015 Ford F-150 for Flat Towing
  • On your 2015 Ford F-150, we have a couple options for you to choose when wiring your vehicle up for flat towing. The first option and most labor intensive would be to use the Roadmaster 7-Wire to 4-wire Flexo-Coil Kit # RM-15247. This kit includes the diodes and wire that will allow you to hard wire into your Ford's lighting wiring harness. You then would run the wiring to the front of the truck and install the 4- wire round plug. The 7-way to 4-way Flexo-Coil will connect your motor...
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  • Adding a 7-Way Trailer Connector to a 2005 Ford Expedition with Factory 4-Way
  • There isn't a harness similar to # 118247 that fits your 2005 Ford Expedition with 4-Way connector but I do have a solution that will allow you to add a 7-Way fairly easily and retain the use of the 4-Way as well. You will need connector # 37185. The 4-Way you have will plug into this adapter. The white wire grounds to the vehicle frame. The other wires will connect to tow package wiring under the vehicle. Follow your 4-Way forward under the vehicle to where it connects to another harness....
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  • What Are Functions of Extra Wires on Bayliner Trailer Tail Light Assemblies
  • Thank you for including a photo of your 2007 Bayliner trailer's passenger-side taillight. It appears your existing light has extra jumper connections on its ground wire (white), stop/turn wire (green) and taillight wire (brown). This may be provided as a convenience to simplify wiring in other lights on the trailer, especially if the trailer is aluminum which makes it tough to get a good ground. We don't offer lights with this wiring set up. Since the 2-pole connectors are the same as...
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  • Replacement Powered 4-Wire Trailer Harness for 2010 Kawasaki Vulcan
  • It sounds like you're looking for a wiring kit like the 4-Pole Trailer Connector and Installation Kit # C59496. This comes with the 6-wire input and then converts to the 4-wire output like what you mentioned. The black wire is for 12V battery power and then the red wire is that brake wire. You can just cut and splice this harness in to where your current connections are so you don't have multiple spliced connections.
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  • Replacing Damaged 7-Way Trailer Connector on 2019 Mercedes-Benz 3500
  • I don't have the color codes, but you should be able to easily determine which wire colors carry which circuits by using a circuit tester like part # PTW2993. Begin with the turn signals and running lights. Have a helper activate the right turn signal while you test each wire, chances are you'll find that the green wire carries the right turn signal. Activate the left turn, which is typically the yellow wire. Testing should confirm this. The brown wire usually carriers the running lights. As...
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  • Replacement 5 Way Connector Needed for Yamaha Boat Trailer
  • Sounds like Fido needs a first class ticket to the dog house! LOL For a 5-way replacement connector for your Yamaha boat trailer, Draw-Tite offers part # 20017 which includes the connector with 48 inch wiring lead and 4 quick splice wiring connectors. The standard wiring on a 5-way flat connector are : White wire - Ground Green wire - Right turn/Brake Yellow wire - Left turn/Brake Brown wire - Taillights Blue wire - Reverse light circuit Since you mention that you have 7 wires going...
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  • Replacing the 7-Way Connector on a 2006 Dodge Ram Truck
  • Sounds like your 2006 Dodge Ram 3500 was wired to be used with a 5th wheel or gooseneck trailer. If you are wanting to switch the 7-way plug back to its original location, then you will need to use the 7-Pole and 4-Pole Trailer Connector Sockets w/ Mounting Bracket and Wiring, # HM40975-11998. This product will allow you wire your Dodge for both a 7-way and 4-pole flat and relocate the plug back to your bumper. Since someone has altered the factory plugs, you will have to hard wire your...
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  • Wiring Harness for 1999 Ford F-250 and F-350 Super Duty
  • If your 1999 F-250 Super Duty pickup had a factory 7-Way wiring harness and the under vehicle connector has not been damaged you could use the Ford Replacement OEM Tow Package Wiring Harness, 7-Way (Super Duty), item # 118243 to replace your pigtail. If you would like to hard wire a new connector to the truck, then you will need to use a circuit tester. item # PTW2993 if you need one, to verify the circuits that need to be wired to the 7-Way, item # HM47210, or 6-Way connector, item #...
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  • Looking for Adapter For 6 Pole Square Trailer Connector on Dutchman Camper
  • It probably wouldn't work. Jayco used a proprietary harness that most likely wouldn't fit. The 6 pole square harness is pretty much obsolete at this point, your best bet would be to cut it off and replace it with a more common trailer connector. In the photo, it looks like there's only 4 wires on the wiring harness. If that's the case, you could just use # 18004. If the wiring harness has 6 or 7 wires, I'd recommend using a 7-way connector like part # A7WCB, as it's what's most commonly...
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  • Replacing Damaged 7-Way on Horse Trailer
  • There's more than one accepted way to wire a 7-way, but the most common uses the green wire for right turn/brake, yellow wire for left turn/brake, brown for running lamps, blue for brake output black for 12-volt accessory power to the trailer, white for ground and purple for the reverse light circuit. Because wire colors can vary so greatly, we typically tell folks to wire by function, not by color. An alternative color code is yellow wire for auxiliary or reverse lights, green for running...
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  • Replacement Wiring on Bully Lighted Hitch Step
  • To replace your wiring on your Bully hitch step # CR-600LED I recommend the Hopkins Wiring Harness with 4-Pole Flat Trailer Connector # HM38138 along with heat shrink connectors # DW05743-5. For added protection you can add a wire loom like # 7509-1 sold by the foot. The wires of this harness have the following functions for you to match up to the wires in the step. White: ground wire Yellow: left turn/brake light Green: right turn/brake light Brown: tail lights
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  • How to Wire Brake Magnets on 8000-lbs Dexter Axle
  • I'll start this off by saying that trailer wiring does not have any standard colors; so it's possible that your trailer just has different color wiring on it. The question you're referencing refers to the different colors of the wires on the magnets and is just an easy way to determine the difference between the # BP01-265 (white wires) which fit brake assemblies 12-1/4" x 2-1/2" and 12-1/4" x 3-3/8"-which are typically found 7k or 8k axles. Conversely the # BP01-301 (yellow wires) is designed...
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  • Installing Replacement 7-Way Trailer Plug on Trailer with 5 Wires
  • We can help you reinstall a working 7-way plug on your trailer. The easiest way to wire in a new 7-way RV-style plug like # H20046 on your trailer is to use a wiring junction box like # 38656. A junction box will allow you to make the wiring connections using ring terminals like # 44-5310A (for 10- and 12-gauge wires) and # DW05702-1 (for 14- and 16-gauge wires). It also makes it easy to replace the plug if it ever becomes damaged or corroded. You'll want to test the wires on the trailer...
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  • Replacing A 4 Wire Trailer Connector With The Bargman WG54006-043
  • The Bargman # WG54006-043, along with any other 7-way trailer connector will have 7 wires inside. Green, red, brown, yellow, blue, black and white. What you are describing with the white, brown, green and yellow wires, sound like the standard 4-pin connections. If your trailer has a 7 way plug with only those 4 wires, it almost sounds like someone may have done a DIY wiring job on this trailer at some point, and wired a 7 pin plug to a 4 wire trailer harness. That being said, you certainly...
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  • Replacing the Car End of a 7-Way Metal Trailer Connector
  • You can replace just the car end, if the trailer end connector is not broken you do not need to replace it. You will just need to remove the broken connector and attach the wires to their respective pins on the 7-Way Metal Trailer Connector, Car End, item # PK12703. You can use the wiring diagram on our Trailer Wiring Diagrams page see link to wire the connector to your vehicles wiring. When looking at the wiring diagram keep in mind that we are showing the connection points inside the...
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