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7 Way Trailer Connector Vehicle Tester

7 Way Trailer Connector Vehicle Tester

Item # TR20117
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TR20117 - Testers Tow Ready Wiring
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A circuit tester that plugs into the 7-way trailer connector on the vehicle and emulates a trailer. The lights let you know what functions (brake, turn, tail, stop, reverse and 12V) are working properly and what functions are not. Lowest Prices for the best wiring from Tow Ready. 7 Way Trailer Connector Vehicle Tester part number TR20117 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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  • Reviews (188)
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Tow Ready Wiring - TR20117

  • Tools for Wiring
  • Testers
  • Tow Ready
  • Tow Function Tester

A circuit tester that plugs into the 7-way trailer connector on the vehicle and emulates a trailer. The lights let you know what functions (brake, turn, tail, stop, reverse and 12V) are working properly and what functions are not.


Features:

  • 7-way circuit tester
  • 12V power
  • Function Codes:
    • BU: back up or reverse circuit center pole
    • RT: right turn/brake
    • TM: taillights
    • LT: left turn/brake
    • BK: Brake controller output
    • 12V: 12-volt power feed


Note: Designed for use with Tekonsha and Draw-Tite aftermarket brake controllers and Ford OEM brake controllers. May or May not work with other manufacturers brake controllers.



20117 Tow Ready 7 Way Trailer Connector Vehicle Tester

Replaces 18179

Installation Details TR20117 Installation instructions



Video of 7 Way Trailer Connector Vehicle Tester

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Tow Ready 7 Way Trailer Connector Vehicle Tester Review

Today we're going to show you the 7-way trailer connector vehicle tester, part number TR20117 from Tow Ready. All right, this is a handy device to keep with your vehicle. You can use this to test your vehicle any time. For instance, you have a problem with your trailer, you're not too sure where to start. Go ahead and use this tool in your 7-pole connector in your truck to verify your truck is working fine, then you know it's on the trailer side. Now the indicators are going to be these LEDs right here.

They have their own markings. TM for the running light circuit or trailer marker lights. LT for left turn, twelve volt power supply, so something in your trailer may require twelve volts like the interior lights or something like that. BK for the output from your brake controller. BU for your backup lights, reverse lights, and RT for your right turn signal.

And bye the way, with the brake controller this test was actually designed for use with Draw-Tite or Tekonsha brake controllers, and also the Ford OEM brake controller as well. This may or may not work with other brands of brake controllers out there. Let's go ahead and plug it into our truck here and show how it works. Just like any other 7-pole connector, you just push it in place. Make sure it's fully installed. You can see where I already have a couple of lights showing up.

One's going to be four a twelve volt power supply, and one's going to be for a brake controller outlet. All right, in this case our brake controller sends out a small trace current to look for a completed circuit, so that's why we have it lit up already and we're not even using our controller. That's perfectly normal. Okay Let's go ahead and try the running light circuit next. All right, that's our indication for the running lights.

Let's try our left turn signal. Okay. Now let's try our right turn signal. Okay. Let's look for our brake signal, which would be indication on our left turn and right turn signals. Okay. All right, and now we'll go ahead and try our back up lights, which we will put the vehicle in reverse. That will finish it for part number TR20117, the 7-way trailer connector vehicle tester from Tow Ready.


Customer Reviews

7 Way Trailer Connector Vehicle Tester - TR20117

Average Customer Rating:  4.8 out of 5 stars   (188 Customer Reviews)

A circuit tester that plugs into the 7-way trailer connector on the vehicle and emulates a trailer. The lights let you know what functions (brake, turn, tail, stop, reverse and 12V) are working properly and what functions are not.

- TR20117
by:

Product works well but as others have mentioned, the red LED lights are hard to see in bright sunlight without cupping your hands to block out the sun. Otherwise this good product would be great! 386043



- TR20117
by:

With this product I was able to narrow down my electrical problem to my truck and not the trailer, and by knowing that the problem was the truck I was able to narrow down the problem down to a 1 foot long piece of wire behind the tail lights but before the outlet. I did all this by simply looking at the tester and following the wires with my eyes. This tester saved me several hours of time, money in parts I didn't need and not to mention the immeasurable frustration caused by trying to find electrical wiring problems. 116192



- TR20117
by:

The product wasn’t very useful for my application. I have an OME installed trailer kit which has an isolation box between the vehicle and the trailer connector. I could tell the turn signals worked and that the electric break controller was working but everything else caused the LEDs to glow with what looks like high impedance semiconductor leakage regardless of whether the light was off or on. There just not enough load in the tester to bleed off stray voltage. I went old school with two clip leads, a 12 v bulb and an ice pick to verify that the vehicle was functioning properly. I have no confidence in what the tester indicates when the LED glow and whether the trailer connector is working or not. This will probable work if you only have copper between your vehicle lights and your trailer connector. 94367



- TR20117
by:

The product plugs in and lights up but the only fault I found is it will not check battery and brake function as should because of the Ford computer. The plug does not pull enough amps for the computer to pick up a trailer connection made. So all that lights up is the other lights such as tail, turn and marker lights. In the description it said it would work with the Ford factory (in dash) controller 596417


Comments
Ford trucks of recent manufacture feature what Ford refers to as a smart trailer connector. The connector wont output 12-volt accessory or brake power to the trailer connector unless the electrical load from a trailer is detected.
-- Mike L - 01/10/2019

48406

- TR20117
by:

The package came without a bruise and before I expected it. GOOD JOB! 903395



- TR20117
by:

This doesn't work with the 2020 Porsche Macan. 901848



- TR20117
by:

Simple, easy to use. Does exactly what I want it to do. 894499



- TR20117
by:

Well rewired my truck and first time was a success! Yay! Worked like a charm and did its job! 878005



- TR20117
by: 09/08/2020

Sorry but it's been only 4 months. It works fine. 875921



- TR20117
by:

Fast, excellent service! 874523



- TR20117
by:

Fits perfectly into 7-pin and works great, verifying everything is working properly! 866086



- TR20117
by: 08/18/2020

Works great 864231



- TR20117
by:

Good product shipped on time. Works great small easy to store in my truck. 861087



- TR20117
by:

Works perfectly! 856468



- TR20117
by:

Easy way to check wiring! I have loaned this to other campers in a campground to help them isolate a problem, and it has been quite helpful. Small and easy to keep in my toolbag. 853201



- TR20117
by:

FAST SHIPPING 848950



- TR20117
by:

Received the product and it works, will.make future testing easy. 848049



- TR20117
by:

Every thing worked out very good 852123



- TR20117
by:

Great 817631



- TR20117
by:

Purcased this product in conjunction with a a 5th wheel/ gooseneck trailer wiring harness. Once the wiring harnesses was installed this tester made it easy to verify that all light functions were working properly without having to actually hook up to a trailer. 5 stars! 778256



- TR20117
by:

I don't trailer very often and this is a handy tool to verify vehicle side plug is working after prolonged periods of non-use. Most issues I find are on the trailer side, i.e., broken lights and wires. 770287



- TR20117
by:

It was perfect to confirm my wiring setup. One minor issue is that the indicator panel was pointed toward the ground when plugged into my truck receptacle, making it next to impossible to read. Rather than return the unit, I loosened a screw and gingerly reoriented the indicator panel for best viewing. The unit works great and fulfills my needs. 769519



- TR20117
by:

product as described. fast delivery 756509



- TR20117
by:

The product was delivered on time and was exactly as advertised. Plug and Play into the existing wiring harness. Using the instructional videos on the website, the harness was neatly installed. 746885



- TR20117
by:

Always wanted one of these. Much better than using an ohm meter. Quick and easy. 738985


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Show More Reviews

Ask the Experts about this Tow Ready Wiring

  • Activating 12 Volt Accessory Circuit of 2002 Ford F-150
    Easiest way to activate the 12 volt accessory circuit of your 7-way will be to run a length of 10 gauge wire like part # 10-1-1 (sold by the foot) through a breaker like part # 9510 from the positive post of your battery to the 1:00 of your F-150's trailer wiring.
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  • Troubleshooting Constant Power on Drivers Side Tail Light of Trailer Connector
    It sounds like you have a crossed wire after the fuse panel. Sometimes this happens inside the trailer connector, so I recommend removing your trailer connector and using a circuit tester like # PTW2993 to test each of the wire functions at the US Car Connection locations like you see on this harness # 20147. If this connection works correctly then you will want to replace the 7-way connector on your vehicle because it has an internal issue. If this is the case, I recommend the Hopkins...
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  • Troubleshooint no Aux Power on the 7-Way Connector on 2016 Mercedes-Benz GLE350D
    On the 7 Way Trailer Connector Vehicle Tester # TR20117 you asked from the function code for the aux power that is listed on other testers is the BU label for back up or reverse circuit. This will test the center pole of your 7-way that can alternatively be used for an auxiliary power on certain applications. If your vehicle is wired for the AUX as reverse, then you will need to shift the transmission into reverse to check that feature on the tester. If you are having problems with...
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  • Tips on Finding the Fuse for 12 Volt Circuit on a 2007 Winnebago Trailer Connector
    The hard way to find a fuse is to trace a wire. This is nearly impossible if the wire disappears into the vehicle where you can't follow it. The manual may not call it something that is obvious. Trailer tow, auxiliary power, or any number of phrases could be used. It could also be located in the cab or under the hood. If the manual is no help most power distribution box lids and panel lids have a legend on them that might be more helpful. If you just cannot find it at all you can bypass...
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  • How To Activate 12V Trailer Charge Circuit On 2019 Ford Super Duty With Factory 7-Way
    If you have already added the fuse and the trailer charge circuit is not activated in the 2019 Ford F-350 Super Duty with factory integrated brake controller, then you want to make sure the trailer is connected and you press the brake according to a Ford Service Bulletin on their factory integrated brake control with trailer module 12V charging system. There may also be a dash setting to activate the tow/haul mode on the 7-way before the 12V output is activated.
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  • Where Are the Trailer Light Fuses On a 2008 Ford F-350
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  • Can a Breakaway Battery and Deep Cycle Battery be Charged off of the Same 12 Volt Line
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  • When Should Brake Output Circuit Light on Circuit Tester part # TR20117 Activate
    Brake controllers are designed to only put voltage on the brake output circuit when they are activated by either a brake pedal or the manual override lever of the controller. If your controller wasn't being activated the circuit on the # TR20117 won't show any voltage. Try having a friend apply the manual override of the controller while you watch the tester. You should see the light on the tester come on at that point.
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  • How to Activate Trailer Tow Charge Circuit in 2017 Ford F-250
    All 2017 F-Super Duty vehicles equipped with a factory trailer brake controller (TBC) utilize a trailer module (TRM) which initiates the trailer charging system. For trailer charging to operate, the TRM must detect a trailer is connected and a brake pedal input before charging will be present at the trailer connector. Adding the trailer battery charge relay and fuse into the battery junction box are NOT required to operate trailer charging with a TRM. This is covered in Ford document...
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  • Troubleshooting Lack of 12V Power at 7-Way Trailer Connector on 2019 Ford F-150
    Since you are not getting the 12V power when your truck is running, you most likely don't have a fuse issue as you stated their isn't a specified fuse or relay in the owners manual. The issue is that your truck is computerized even at the 7-way. It can sense when a trailer is connected based on the voltage draw so it won't sent a signal for 12V when using some testers, especially LED testers because there isn't enough of a power draw. The system requires a power draw on the 7-way...
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  • How to Bypass Smart Tow of 2019 Ford F-150 to Activate 12 Volt Accessory Circuit
    I really wish we had an easy solution, but the smart tow setup of your 2019 Ford F-150 won't allow the 12 volt circuit to be active without an actual trailer connected. That said I do have an option to bypass the factory wiring and give you an active 12 volt power circuit on your 7-way. For that you'd want to run a length of 10 gauge wire like part # 10-1-1 (sold by foot) through a breaker like part # 9510 from the 1:00 pin of your 7-way to the positive battery post in your vehicle and...
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  • Trailer Fuse Locations on a 2018 Ford F-150
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    You basically already did verify that the center post of your 7-way is the 12 volt accessory circuit. Normally the center post is the reverse light circuit and the 12 volt pin is the 1:00 pin position. If your center pin is hot all the time then it would be the 12 volt accy circuit.
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    I pulled up the owners manual of your 2019 Ford F-450 and the fuse slot 27 is the one that carries the 12 volt trailer wiring circuit. Relay slot 37 is the relay related to this circuit too. One option you have would be to bypass the factory wiring and run your own 12 volt circuit straight to the battery. You would need 10 gauge wire like part # 10-1-1 sold by the foot and a breaker like part # 9510. You would just run the wire from the 12 volt pin of the 7-way at the rear of the vehicle...
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    The 12 volt power circuit of the 7-ways on the newer Ford trucks like your 2017 Ford F-250 is an odd situation. Many people have the same issue as you or they have found that the gauge wire used for this circuit is just too small to power anything. Best option is to bypass it all with 10 gauge wire like part # 10-1-1 and a circuit breaker like part # 9510 to run from the pin on the 7-way all the way to the positive pin of the truck battery. This will give you a circuit active whenever needed...
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    The 7 Way Trailer Connector Vehicle Tester part # TR20117 should work well to test the trailer battery charge line on Ford trucks with the Smart Tow Package because as you mentioned the trailer battery charge line is not active until a trailer is connected and you depress the brake pedal. The 7 Way Trailer Connector Vehicle Tester part # TR20117 would then act as if a trailer was connected. That said, if you are having issues with the trailer battery charge line circuit then make sure you...
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    A lot of times the 12 volt accessory circuit isn't active on vehicles for the trailer wiring. Sometimes it's just a matter of inserting or replacing a fuse under the hood of the vehicle. Or in other times a relay has to be installed. We've found that the easiest way to bypass all of that is to use 10 gauge wire like part # 10-1-1 to run from the vehicle's positive battery post through a breaker like part # 9510 to the 1:00 pin of the 7-way.
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