Helpful Hints: Tail Light Isolating Diode System Demonstration
Help, Demos, and How To Info
Wiring
Help Section - Vehicle Wiring
Wiring for towing
Tow Ready Vehicle to Vehicle Tail Light ConverterTow Ready 7 Way Trailer Connector TesterTail Light Isolating Diode System for Towing VehiclesHow to Use Scotch Locks for WiringQuestions and AnswersWiring Installations
Acura
Wiring Harness Installation - 2007 Acura MDXChevy
Wiring Harness Installation - 2003 Chevy MalibuWiring Harness Installation - 2007 Chevy HHRWiring Harness Installation - 2007 Chevrolet Silverado7-Way Pre-Wired Car Connector 7 Foot Lead Installation - 1998 Chevy SilveradoWiring Harness Installation - 2006 Chevy UplanderWiring Harness Installation - 1997 Chevy Express Full Size VanWiring Harness Installation - 2007 Chevy AveoChrysler
Wiring Harness Installation - 2008 Chysler 300 Touring EditionDodge
Wiring Harness Installation - 2006 Dodge RamWiring Harness Installation - 2007 Dodge ChargerMulti-Tow Trailer Wiring Harness Adapter Installation - Dodge DurangoWiring Harness Installation - Dodge NeonWiring Harness Installation - 2004 Dodge Grand CaravanWiring Harness Installation - 2000 Dodge Ram 1500 VanFord
Wiring Harness Installation - 1996 Ford ExplorerWiring Harness Installation - 2006 Ford E350Wiring Harness Installation - 2005-2007 Ford Escape HybridGMC
Wiring Harness Installation - 1998 GMC JimmyHonda
Wiring Harness Installation - 2007 Honda PilotWiring Harness Installation - 2006 Honda OdysseyHyundai
Wiring Harness Installation - 2007 Hyundai SonotaIsuzu
Wiring Harness Installation - 1997 Isuzu RodeoJeep
Wiring Harness Installation - 1999 - 2004 Jeep Grand CherokeeWiring Harness Installation - 2005 Jeep LibertyWiring Harness Installation - 2007 Jeep LoradoKia
Wiring Harness Installation - 2007 Kia Rondo4 Pole to 5 Pole Wiring Adapter Install - Kia SedonaLexus
Wiring Harness Installation - 1999 Lexus RX300Nissan
Wiring Harness Installation - 2005 Nissan MuranoWiring Harness Installation - 2007 Nissan XterraPontiac
Wiring Harness Installation - 1999 Pontiac Grand PrixSaturn
Wiring Harness Installation - 2008 Saturn OutlookSubaru
Wiring Harness Installation - 2007 Subaru ForesterWiring Harness Installation - 2004 Subaru ForesterSuzuki
Wiring Installation on a 2004 Suzuki XL7 - 118372Toyota
Wiring Harness Installation - 2006 Toyota HighlanderWiring Harness Installation - 2008 Toyota SiennaWiring Harness Installation - Toyota TacomaWiring Harness Installation - 1998 Toyota CamryVolvo
Wiring Harness Installation - 2003 Volvo S40Wiring Harness Installation - 2004 Volvo XC90Information Categories
Backup Cameras
Bike Racks
Bike Rack Accessories
Brake Controllers
Cargo Carriers
Cargo Contol
Bug Shield & Air Deflector
Fifth Wheel Hitches
Gooseneck Hitches
Ladder Racks
Locks
Mirrors
Performance Chips
Tonneau Covers
Tools
Trailer Hitches
Trailer Hitch Accessories
Trailer Parts
Trailer Service
Vehicle Trim
Weight Distribution
Archive by Date
Products shown in this video
Helpful Hints: Taillight Isolating Diode System
This part is for a vehicle to vehicle towing kit. What this basically does is, say you have an RV or motor home or pickup truck and you're going to towing another vehicle on all four wheels you're going to need this wiring harness to make the lights on the towed vehicle work with the towing vehicle. We'll start by showing you the different components of this kit, it's really pretty simple if you break it down. First the connection here is a traditional four pole flat. So you have your four basic signals, your ground, running lights, left turn and right turn. You also have plenty of harness to attach this on the towed vehicle. When you make your connections on the towed vehicle itself, you have to install these diodes here. At the point where you make your connections on your vehicle whether it be your left or right turn or the running light circuit you will have to install these diodes.
To give you a couple of quick notes about these, what happens is they do go in a specific direction in the wiring harness. to keep it simple basically the single prong here is listed as out, that goes onto the taillight itself out to the bulb. Then you get the two inputs here, one of the inputs is going to be the wire you just cut because you're going to splice this in between the two. It does not matter which one, the wire is going to come in one side and out the other. This other pin here is going to provide input from your trailer harness coming from the towing vehicle itself. So for instance you would take your green wire here and run it to the other open end and it will go out and power your taillight being towed down the road by the RV. As you can see there's 4 diodes and there's a reason for that. There's going to be one for the left and right turns, and both turn signals are going to have there accompanying running lights. So you're going to need a diode for each of the running lights. Now we've opened up a small bag of parts which contains all the spade connectors needed to do the install. Basically what these are, you cut your wire that you need and you splice the wire back and expose about a quarter inch or so of it and these get crimped on. Be sure you have the right tool to do that with because it makes all the difference in the world with a tight connection and loose connection. Once you do that, it just slides onto the diode prong itself. You may also want to invest in some dielectric grease that will protect it and keep things out that would cause corrosion which would eventually cause an open circuit. As one final note you may want to take into account, if your towed vehicle has the same turn signal and brake light bulb, this kit is for you. If you have separate stop lights and turn signals, say for example your turn signals are amber that means there's going to be a different box to achieve that so you have your separate turn signals and stop lights still the same. That covers part # 38955.
Related Videos
Help Section - Vehicle Wiring
Wiring for towingTow Ready Vehicle to Vehicle Tail Light ConverterTow Ready 7 Way Trailer Connector TesterTail Light Isolating Diode System for Towing VehiclesHow to Use Scotch Locks for WiringQuestions and AnswersHelp Section - Trailer Hitch
How to install a trailer hitchTowing system componentsExplanation of hitch classesTrailer Hitch Classes and Weight CapacitiesChoosing the correct ballmountHow to determine your hitch sizeTips on how to tow a trailerClass I Trailer Hitch Review and Weight CapacitiesClass II Trailer Hitch Review and Weight CapacitiesClass III Trailer Hitch Review and Weight CapacitiesMaking a bolt leader with stove wireHow to Lower an Exhaust PipeLowering the exhaust pipeUsing Fish WireMinor Drilling for Hitch InstallEnlarge an Existing Frame HoleQuestions and Answers
