Tail Light Isolating Diode System with Wiring Harness

Hopkins Tow Bars - 38955

Allows motorhome or R.V. to power the lights on the towed vehicle without power feedback.

• Includes 4-pole flat trailer connector.
• Max amperage: 3 amps
• Max voltage: 24 volts
• Wire lead: 35' long
  • White ground wire measures 42" long.

Please note - 3 wire system on towed vehicle: If the towing vehicle has a 3 wire system, where the brake signal is sent along a separate wire from the turn signals, then a wiring converter (118158) and 2 additional diodes are needed to retain separate amber turn signals. If you only use this diode kit (38955), then the vehicle brake lights will function as brake and turn lights.

Video of Tail Light Isolating Diode System with Wiring Harness

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• Using Tail Light Isolating Diode System on 1996 Plymouth Voyager Equipped with 4-Pole Flat Connector
  
• Using the Tail Light Isolating Diode System, part # 38955 will tap into the tail light circuits of your Voyager, but not affect your existing tow wiring. The diodes are used to make sure that no voltage feeds back into the tow vehicle. The product description page features easy to follow wiring diagrams to assist your installation.
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• Pollak 6-Pole Trailer Wiring Socket # PK12720 Recommendation for Flat Towing a 2011 Honda Fit
  
• I would recommend you remove the 4-wire flat plug and replace it with a Pollak 6-Pole, Round Pin, Plastic Trailer Wiring Socket, part # PK12720, like you mentioned. This way you would not have to use an adapter which would give you a cleaner install and give you one less component that could potentially fail on you. I attached an FAQ article on tow bar wiring below for you to check out also.
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• Recommended Tow Bar Wiring for a 1999 Chevy Suburban
  
• To wire your Suburban for flat towing, there are three choices. A magnetic mount lighting system like part # C-ATL20A is a good choice if you are not planning on towing the vehicle frequently. Since you are looking to permanently wire the vehicle, either the Roadmaster Wiring Kit with Bulbs, part # RM-155 or the Tail Light Isolating Diode System with Wiring Harness, part # 38955. Part # RM-155 features bulbs that would mount using holes drilled in the tail light assembly of the vehicle. This
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• Is it Safe to Use Tail Light Isolation Diodes on a 2005 Jeep Wrangler TJ for Flat Towing
  
• Yes, it is safe to use diodes on your Jeep Wrangler. Diode Kits, like the Hopkins Tail Light Isolating Diode System, item # 38955, are designed to stop any power feed back onto the vehicles electrical system. If it concerns you, and drilling a hole in the tail light housing is not an issue, you can definitely use a bulb kit on your TJ. Blue Ox recommends the Blue Ox Tail Light Wiring Kit, item # BX8869, along with the Blue Ox 4-Wire, Coiled Electrical Cord and plugs, item # BX8861. I would
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• Tow Bar Wiring Recommendations for Flat Towing a 2011 Chevy Malibu 1LT with a 2010 Jayco Seneca
  
• For tow bar wiring you basically have three options to choose from. You can use the magnetic lights like you are familiar with, like a RoadMaster Standard Magnetic Tow Lights, part # RM2120. You can use a diode kit like the Tail Light Isolating Diode System, part # 38955, that you referenced. If you are looking for the highest quality diode kit on your 2011 Chevy Malibu you would want the Roadmaster Universal Hy-Power Diode Wiring Kit, part # RM-154. Or you can use a bulb light kit like
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• Wiring or Lighting Recommendation For Flat Towing a 2011 Chevy HHR Behind a Motor Home
  
• There are actually a couple of different ways you can add wiring or lights to your 2011 Chevy HHR so it can be flat towed behind a motor home. I have included a link to an FAQ article that explains the different options. If you plan on towing the HHR often, it would be beneficial to install diodes using Roadmaster Universal Hy-Power Diode Wiring Kit, # RM-154. I have included a link to a video showing a typical installation. If you do not plan on towing it often, I recommend going with the
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• How to Wire a 2007 Jeep Wrangler so All Running Lights Work Front and Back When Used as Toad
  
• If you want to run the lights at the front of your toad you will need to install a diode at each running power wire going into the light bulb socket. You would need extra diodes, # 48955, and you would need to splice in extra wiring, # DW02360-1. Wiring the front running lights will be similar the wiring the rear running lights, see attached photo. You will need to make sure that your towing vehicles trailer wiring is capable of handling the extra amperage required by adding the extra
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• Wiring a 1999 Jeep Grand Cherokee with Diodes to Flat Tow behind a Motor Home
  
• We actually have some helpful diagrams on the product page for the Tail Light Isolating Diode System, # 38955, as well as some videos and an FAQ article that I have linked for you. All of these items should be a big help. When checking the wires on the vehicle to determine function, you will need a circuit tester like # 3808. You will probe the wires behind each tail light to find the turn signal, running light, and brake light wires. You will then wire them into the diodes according to the
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• Can the Hopkins Isolating Diode System Be Used on a 2011 Buick Enclave without Throwing any Codes
  
• Yes, you can use this Tail Light Isolating Diode System # 38955 on your 2011 Buick Enclave with out it affecting the on-board diagnostics of your vehicle. Check out the video I attached that shows this product being installed onto a very similar Buick Enclave as yours.
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• Recommended Tow Bar Wiring Kit for 2005 Jeep Wrangler X
  
• According to Roadmaster, there is sufficient room in the tail light assemblies of a Jeep Wrangler to accommodate the separate bulb and socket like that used with part # RM-155. I would recommend that system, as the install is simpler with no splicing into the existing wiring on your Jeep. The wiring for towing will remain completely independent of the wiring on the Wrangler. There is nothing wrong with the Isolating Diode kit, but the install is more involved and time consuming. For more i
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• Tail Light Isolating Diode System # 38955 Install on 2011 Ford Fiesta
  
• If you go to the product description page for the Hopkins Tail Light Isolating Diode System, part # 38955 and scroll down to the bottom of the page (use the provided link) you will see 4 install diagrams. The wiring method used will depend on the way the tail light circuits on your RV are wired. The lights can be wired in one of two different ways. If your RV uses what we call a combined system, the brake light and turn signals are combined into a single circuit, using a singe bulb on each si
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• Wiring Needed for Towing a 2007 Kia Rio with a 2008 Freedom Express Class C RV
  
• Your Kia requires a taillight converter, so you will need the Tail Light Isolating Diode System, part # 38955 and the Vehicle to Vehicle Taillight Converter, part # 118158 along with two extra diodes, which will require purchasing the Tail Light Isolating Diodes Qty 4, item # 48955, or the Roadmaster Hy-Power Diodes Qty 2, item # RM-792. If you do not mind the brake lights blinking when the turn signals are activated then you can just use the Tail Light Isolating Diode System, part # 38955, a
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• Towing a 2008 Dodge Ram with a Motor Home
  
• For wiring you will need two parts item # 38955 and item # 118158. You will also want to take a look at the Roadmaster Braking system
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• Wiring Lights for a 2001 Toyota Tacoma Being Towed by a RV
  
• You have a couple of options here. To hook your truck directly into your RV so that the vehicle lights work just as the RV. If your vehicle has separate turning and brake lights, you will need to also use a converter. Another option would be a towing light kit. We have an LED light kit or an incandescent light kit that includes two magnetic lights you would mount on the back of your truck and the necessary wire. Because your RV has a 4-way round connector, you will need an adapter.
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• Wiring a RV to Tow a 1998 Saturn SL2
  
• To wire your RV to tow your 1998 Saturn SL2 you will need part 38955. This kit will use the Saturn brake lights for both the brake lights and turn signals. If your SL2 has amber turn signals, you will also need part 118158, and two extra diodes, item # 48955, if you would like the amber turn signals to function.
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• Can a Tail Light Isolating Diode System Be Used on a Chevy Colorado with Separate Brake Light
  
• Yes, you can use the 4-Diode System, part # 38955, to wire your Colorado. As you pointed out, the turn and brake signals will not longer be on separate bulbs. The diodes should be sealed enough that they will hold up mounted near the tail lights. I would not put them in direct exposure to rain or road water. I would mount them behind the tail light housings using the light fixture seal to block out most of the rain water. I would also use a dab of dieletric grease, part # 11755, at each spade
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• What Parts are Needed to Wire a 1995 Saturn SC2 to Tow Behind a 1990 Holiday Rambler Motor Home
  
• The the 1995 Saturn SC2 does not have amber turn signals in the rear, the brake and turn signals are still separate like amber turn signal vehicles. There are two basic methods for adding lights to a vehicle for towing, non-permanent and permanent. The non-permanent solutions are magnetic or clip-on light kits that temporarily attach to the cars. These are good solutions for folks who like to take different vehicles or do not want the wiring work involved with permanent kits. We carry sever
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• Are There Custom Fit, Plug-In Tail Light Isolating Diode Systems?
  
• Flat towing a vehicle is not something that as may people do as say using that same vehicle for towing a small utility trailer. None of the towing parts manufacturers, at least to my knowledge, have started building custom fit diode kits because the demand would not be there to offset the design and engineering costs. The T-One harness you installed, cannot be used in reverse. Trying to send power the other way at best would simply not work, at worst it could cause damage. There is a law h
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