Used when a motorhome is towing another vehicle by way of a tow bar. If the towing vehicle has a 2-wire system and the vehicle being towed is on a 3-wire system (the vehicle has amber turn signals, separate from the brake signals), the vehicle to vehicle taillight converter will need to be used. This item cannot be installed backwards (the input going to the output side) to convert a tow vehicle down.
Note: The tail light isolating diode system (38955) will need to be used with the converter (118158) to prevent power feedback. Vehicles with separate turn signals and brake lights will need a total of 6 diodes.
Replaces 31820
Video of Vehicle to Vehicle Taillight Converter
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Video Transcript for Vehicle to Vehicle Tail Light Converter Demonstration
This is a taillight adapter which will convert your two wire system on your towing vehicle up to a three wire system to your towed vehicle. Certain applications will be say, your RV has a four wire system on it or maybe a five wire system converted down to a four wire but your towed vehicle has separate turns signals and brake lights. You would use this box to convert it back up to that at the rear of the vehicle. Well cover a few technical points on how it actually gets installed. Well show you how it typically gets installed, the nuts and bolts of it. Its a little bit easier than you think. Basically were going to use this four pole wire harness as a model here, this is going to be the lead thats going up to the RV or towing vehicle. What happens is you have the four wires obviously, the ground, running lights, and turn signals.
These are going to be inputs on this side of the box labeled input. Basically youre going to do it color for color if you notice youre going to have the brown wire left out. That doesnt have to be changed or anything that can go straight out to your taillights. Chances are youre probably going to have to split this to go to the left and right side taillights. To recap, this is going to be color to color on that and this will go up to your RV. On the opposite side here, where its labeled output this actually gets connected to the wire harness itself on the towed vehicle. These will go right behind the taillights, so for instance on the left hand side your yellow will get connected to the left hand turn signal. The same thing for the green except it will go to the right. If you notice on the stop signal theres one wire, again youre going to, just like the running light, split this off to the left and right stop light signals. Other than that, its a pretty simple install, it looks complicated but if you take it step by step, its going to be pretty easy to do. As a final note, this is a heavy duty relay unit which may be mounted at the rear of the towed vehicle to facilitate wiring. There you have it for part # 118158 the Tow Ready Taillight Adapter.
Customers compare 118158 to these similar products
Average Customer Rating: 4.5 out of 5 stars (6 Customer Reviews)
- 118158
by: Henry J05/04/2011
Is this review helpful?
I mounted a juction box on the front of the trailer and connected my 4-wire trailer connection to it. From this box I ran a ground wire to all lights and to the convertor input, the green right turn/stop to the convertor input, the yellow left turn/stop to the convertor input, the brown to my tail lights, license plate light, marker lights and clearance lights.
I ran the 3 wires from the convertor output to another juction box. I connected the green right turn to the right amber light, the yellow left turn to the left amber light, the red brake to the red right and left brake light and the third brake light. No diodes needed.
I'm using your Bargman LED Double tail light Red and Amber and Bargman wraparound clearance/side marker red on rear amber on front.
You people at etrailer are "THE BEST". I believe you are the only outfit that knows your products and can tell us how to install them!12888
Very disappointed. Between the Left turn/stop, and the Left turn only there is a 90 degrees phase change. In other words the turn only lights do not blink at the same time as all my other lights that have turn/stop. This also applies to the right turn signal too.
The only thing that works like I wanted is the stop only wire.21451
If the vehicle you are towing with has separate stop and turn signals then it will need to be wired with a Modulite converter so that it can run the lights on the vehicle you are towing that does not have separate turn signals and stop lights. If the vehicle you are towing with is already setup to tow a trailer then the Modulite converter is most likely already installed.
If you are towing with the 1994 Ford Ranger mentioned above then you will need to wire it with a 4-way connector that conv view full answer...
To convert from US to European wiring you will need the Vehicle to Vehicle Taillight Converter, item # 118158, which will convert the 2 wire system on a towing vehicle to a 3 wire system on a towed vehicle or trailer. You will run the taillight circuit normally and it is not required to run through the converter.
If you are installing the converter on a towed vehicle you will need to use Tail Light Isolating Diodes, item # 48955, to keep the towing vehicle from back feeding into the towed veh view full answer...
A 5-pin round connector is pretty rare, are you sure you do not have a 6-pin, 5 pins in a circle with one pin in the center?
Having both trailers work with your 7-way connector on the Pilot will be pretty easy. You will need a 4 pole to 7-way adapter, part # PK12716. This will allow you to tow the trailer with the 4 pole connector with no problem.
For your trailer with the 5 pin round connector, you will have to make a wiring modification to the trailer because of the separate brake ligh view full answer...
Wiring the different vehicle systems can be a bit confusing but once you know what wiring system your vehicles have and get the proper instructions, you will be able to wire the vehicles. Your 2007 GMC Envoy most likely has a factory 7-Way connector at the rear of the vehicle which is converted to a 2 wire system so you will need to wire the Honda Fit to work with that system. If your motor home has a trailer connector at the rear, it is most likely converted to a 2 wire system also. You will ne view full answer...
The Tow Ready Vehicle To Vehicle Taillight Converter, # 118158, you have referenced will not be needed since you will be staying with a 3-wire system (separate stop and tail lights)on both of your vehicles. The converter is only needed if you had a 2-wire system (combined stop and tail lights) on the towing vehicle and a 3-wire system on the vehicle being towed.
I would recommend using a diode system to wire your vehicle because the diodes will prevent feedback from going from the taillights view full answer...
The other two diodes are needed so you can have separate turn and brake signals. So you will have a diode for each brake light (right and left), a diode for each turn signal (right and left) and a diode for each tail light (right and left).
I will send you a link to the wiring diagram of the # RM-154 wiring kit to show where all of the diodes are connected and what color wires go to what function on the tow vehicle. A separate wire for the brake circuit will have to be run on the towed vehic view full answer...
The trailer wiring connection for your vehicle should already be converted to negative ground, so the Vehicle to Vehicle Taillight Converter, item # 118158, should work just fine on your vehicle.
I would test the trailer wiring connection on the vehicle to be sure that it is converted properly before installation. Testing will need to be done with a multimeter, item # BTMT15, if needed. Set the meter to test DC voltage and, with the tail lights on, connect the red wire to the tail light termi view full answer...
I think your best option would be to remove the 6-way that is on your Bunkhouse trailer and wire by function to a 4-Pole Trailer End Connector, part # 18004.
Since it sounds like your trailer has separate tail light functions, meaning the blinkers and brake lights are not on the same bulb you will also need a Taillight Converter, part # 118158, to convert the combined tail light circuitry of your 2000 Honda Valkyrie Interstate to the separate circuitry that your trailer has.
Once you remov view full answer...
Although there are two different methods of wiring a towed vehicle that uses separate turn signals, we recommend using the 6 diode kit part # 154-792-118158, which includes the converter you mentioned.
I will link you to several of our flat towing FAQ articles, one of which will tell you exactly how to wire your Samurai. Refer to Option # 2 on the Diode Installation Instructions for a Dinghy with Separate Tail Light Wiring FAQ page.
Keep in mind that in addition to a tow bar, base plates a view full answer...
To provide a 4-pole connector on your Liberty for towing a trailer, you would need part # 118524. The Tow Ready T-1 connector installs inline at the point where the factory tail light harness plugs into the tail light assemblies. Other than running a wire to the positive battery terminal to provide power, installation is plug-and-play.
Installing the Tow Ready # 118524 will not interfere with your existing wiring for flat towing.
I have linked you to the install instructions for the T-1 wi view full answer...
The absolute easiest solution for you would be to use a set of magnetic towing lights like our part number # C-ATL20A. This would simply plug into the trailer connector on your tow vehicle and would stick to the trunk lid of your towed vehicle and would provide all the tail light functions.
It sounds like you may need a Roadmaster Brake-Lite Relay Kit # RM-88400. This product keeps your towed vehicles brake signal from overriding the turn signal sent by your motorhome.
The tail light conve view full answer...
To safely tow your Dakota 4X4 with your Coachman RV you will need several components. Those items are a tow bar, base plate kit, safety cables, tow bar wiring or light kit, and possibly a supplemental braking system to actuate the Dakota brakes when you apply the brakes in the motorhome. Please note that some states require use of a supplemental braking system; check the laws in your state to ensure you are compliant. Please refer to the attached article which provides a complete overview of eac view full answer...
If you were to use a converter like # 118158 or similar you would be able to isolate the turn signals from the brake lights and then run those to separate lights. The rear tail lights would then be brake lights and running lights only (the tail light wire bypasses the converter). The brake light wire coming out of the converter would have to be jumped from one tail light to the other.
In order to also keep turn signal functions at the rear tail lights you would have to run jumpers from the ne view full answer...
Yes, the Vehicle to Vehicle Taillight Converter # 118158 would work well to separate the combined turn signal circuits from your 2012 Subaru Outback with combined wiring to the separate wiring of your trailer. This would be the only product you would need.
Basically, you would want to mount this product somewhere near the connector on your trailer and then splice the wiring in. The box is labeled to let you know exactly which wire goes where, but you will need to run the right turn/stop light view full answer...
What the vehicle to vehicle (or vehicle to trailer in this case) does is to take the combined turn and brake signals on a vehicle trailer connector and separates them out so the turn signals and brake lights are separate. When using this converter on a trailer like you want to, you would not have to use diodes. I have included a picture that shows how it would wire up.
Essentially you would mount this converter on the trailer. The trailer would need a regular 4-Way flat connector like # HM481 view full answer...
At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time.
4.5 out of 5 stars (6 Customer Reviews)
