Videos are provided as a guide only. Refer to manufacturer
installation instructions and specs for complete information.
Adapts import and domestic vehicles with separate turn and stop lights (3-Wire System) to standard trailer taillight wiring (2-Wire System). In a three wire system, a separate wire is used to carry each of the stop, turn, and running light functions to the taillight assembly. On most trailers, the stop and turn signal functions are sent through the same wire.
Features:
Specs:
119175 Circuit Protected Taillight Converter with 4-Flat End
Video of Upgraded Circuit Protected Taillight Converter with 4 Pole End
Videos are provided as a guide only. Refer to manufacturer
installation instructions and specs for complete information.
Today we are going to do the Frequently Asked Questions of what is the difference between a three wire system and a two wire system. It is actually very easy and very simple. All it is, is you take away two wires and the same thing applies to the four and five wire system. Starting off on the car side we are going to attach the wiring to, we are going to have five wires. Green is going to be right turn, red is going to be the brake signal, yellow is going to be left turn, brown is going to be your running lights, and the white is going to be ground. When you talk about the three wire system you are only talking about the right turn, the brake signal, and the left turn. You omit the brown wire and the white wire. That is our three. On the two wire system you are only dealing with the two combined signals, the brake signal and the turn signal on the same wire. We are only dealing with the left and right turn. 00:46
Next we will show a couple of examples of a two wire system compared to a three wire system. First we are going to show you a version of a two wire system. We are going to use my little truck and we are going to show the turn signal first and then we will stop that and we will turn on the brake signal. I have got my left turn signal on and now hit the brake and you see the actual same bulb turns on. That tells you that it is a combined system. In this vehicle it is going to be very easy to see that we have a three wire system. First off we have got the yellow turn signal to tell us right away that is going to be a separate system. Yellow is going to be the turn signal and the red on the bottom is going to be our brake light. Just to reiterate we will turn on our turn signal and then we will hit the brake signal and you can see the difference so that means we have got a three wire system.
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Average Customer Rating: 
4.8 out of 5 stars (6 Customer Reviews)
by: Adam S.03/19/2010
Is this review helpful?
Great kit to add to any car I found the instruction easy to understand and I event watched the install video on the site. I am a pretty good elecrical guy so it was no problem for me, but you are going to need to know how to test probe the tailight plugs to find out what wires to connect to. I would suggest not using scotch locks to connect to the wires. Soldiering is the only way to make sure you arent damaging the wires. Good wiring option in a small package.2826
by: William I.01/05/2010
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Good product, a bugger to inst Very pleased with the product. I ended up tearing my trunk apart to find all of the wires that I needed, but all's well that ends well. It will be very simple to use now.2625
by: Graham f10/05/2012
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Excellent product, first class service as is the norm from etrailer.56428
by: Jesse B.07/06/2012
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Easy install (though haven't gotten the trailer to give it a try yet). Seems to be of good quality.46885
by: Scott M.03/18/2012
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The staff at etrailer.com had my order filled and at my doorstep in 3 days. Amazing service and one stop shopping for high quality parts. I added them to my favorites list.34249
by: Gary G10/19/2011
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Ordered and delivered in less than 24 hours with free shipping! Thanks Etrailer. Gary G25773
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Installation Details
