7 Way Trailer Connector Vehicle Tester

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

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

This 7 Way Trailer Connector Tester does Exactly what I was hoping it would do. It clearly indicates which electrical function is working on the Vehicle. I rated this "Very Good" rather than "Excellent" for ONLY one reason. When looking at the indicator lights on the tester they DO show which function is operating. What "might" be a little confusing to some is the fact that the indicator lights to not match exactly to the location of each tab inside the plug mounted on the Vehicle. Had the indicator lights on this tester match each location inside the plug I would absolutely have given this an "Excellent" rating. I still feel this is a Very Good tool for testing the wiring to insure each function is working properly. 88545

This tester is easy to use, just plug it in. I was quickly able to rule the truck in as the source of my brake issues on the trailer. 561633

works well was satisfied with Item and on time delivery. 202044

Works Great, use it often

Billy C - 06/16/2016

by: Kevin09/22/2018

Worked as advertised. 567659

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

Great function and fit. I'll keep this in the glove box in case there are any issues. 224842

Everything is working fine, although we dont get out to use it as much as wed like :

John E - 09/14/2016

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

This product (TR20117) helps with verifying that vehicle outputs are correct. If the vehicle is good you are ready to troubleshoot the trailer. I use a small 12 volt battery and two leads with alligator clips to test each function on the trailer. Etrailer has excellent wiring diagrams and diagnostic information - in addition to excellent pricing, great service and delivery. Hope this helps.... Pat 206576

It would seem the product is exactly what it is advertised to be. It will be handy for us when customers pick up trailers to be sure it is the tow vehicle and not the trailer. Hopefully it will last a long time. Easy to read and use 260642

The product is good with the STANDERD trailer hook up, But it does NOT work on my 2013 chevrolet 2500 inergrated braking towing controller ( IBTC ) When you hook the tester to the plug and apply the trailer brakes all you see is one Blink on the tester and then it goes back out. Now I took my New 2013 truck to the dealer and they checked the braking system and found Nothing wrong and said it was OK . Please test this on the 2013 chevrolet 2500 ( IBTC) and you will see what I mean and please if there is anything that I have done wrong please contact me because this tester does NOT work on my NEW truck .....Please respond ! 106348

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

Product works as expected; makes vehicle electrical system testing very easy -- simple, yet effective. Will recommend this product to my company's installers and customers. 654123

Very helpful plug to diagnose towing wiring from truck to trailer Nice price 649880

This is a must if you are pulling trailers using multiple trucks for towing. it will save you hours of work figueing out problems. 649749

This item saves a lot of time and guess work, best money spent with Etrailer 649519

Saves time trying to figure out where problem is. 649476

by: Scott S05/15/2019

The parts (trailer brakes and supplies for initial brake install) were delivered ahead of schedule, they were all in good shape, and they have all worked great. 642733

great help 638331

by: Mike R05/01/2019

I'm glad i bought this tester, as it made the installation of my brake controller and wiring adapter much easier. 636052

by: Ronnie B.02/28/2019

This tester still works great and makes sure I’m ready to go down the road with my trailer. It’s durable and about as handy a tool as you could ask for. I would also recommend etrailer.com for all your towing needs. Their customer service and follow up are second to none! 609210

by: Brian02/14/2019

Easiest thing for trailer wiring ever! 604903

must have to figure out all the wiring on car and trailer. thank you. it is great. 598420

great product, saved me a lot of head s cratching 592646

I wish that I had this product many times over the years of pulling trailers with different vehicles. It makes it so easy to verify that all light connections are properly wired and working correctly. I have several vehicles and I can check each one in a couple of minutes and verify proper wiring. The test lights are bright and can be seen even in sunlight. I would recommend this product to anyone that pulls a trailer. 589922

by: Jorge12/07/2018

Works like a charm. Just plug and play. Etrailer is great too. First time anyone contacted me a year after purchase just to find out if I was happy with their products. 589098

by: Alexandru11/30/2018

Worked as it should be! 586539

Product arrived today. Product works as described. 584010

Takes the guess work out of if/where there is a problem. Like having an inexpensive electrician in your toolbox. 582377

Helped comfirm a successful installation of the wiring harness. 568901

Works great no more guessing if your hooked up or if you have a blown fuse. 566485

Excellent product. Quick shipping and easy installation. 542694

Service great and product works as expe cted 527137

This is a great product to see if the lights are working properly on your trailer. It would have been nice if there were instructions on light indications when lights are properly working. 525387

Test lights work great, now I will be able to troubleshoot other peoples trucks faster when they say their lights are not working. Thank you 522784

At this time I can give only a partial review of the product because I can not op check it until my brake controller is installed but I'm sure it will function as advertised. As it stands, this is a good looking, nicely designed and crafted piece of equipment and fits snugly into the cars receptacle. 515345

Good product , great service as always! 513509

Did a great job of sorting wires.

Eric K - 06/03/2019

A very handy tool to have in any tow vehicle. Before connecting to any trailer you can check to make sure you have power . Especially, brakes and lights. Thank you. 512969

Good product works great 510362

Its still works great,no problems with it at all

Donald - 05/19/2019

Great for trouble shooting wiring conne ction. 508931

Works as advertised. I'm very pleased with this product. 503948

by: Roy04/29/2018

Easy install, and functions fantastic 502516

Very good product 497269

by: Robert04/04/2018

It works well as designed. You know right away if your vehicle is sending out the correct signals before you have to hook up the trailer. 492489

by: Daniel03/27/2018

This has held up to heavy use and is still working. 489573

Exactly the device I wanted at a more than reasonable price. Quick delivery. 488797

Just what I needed to check some trailer and brake circuits. 483740

Product came in correct and on time just as requested. 482007

by: Thomas02/26/2018

great way to check all the trailer circuits to troubleshoot why certain lights aren't working. This enables the popular method of troubleshooting used by us electronics guys... "divide and conquer". Lets one know if the problem is in vehicle or trailer. 479222

Came in on time and works great 479022