IIT 16687 7 Blade & 4 Pin Tester,

$ 11.40

Score By Feature

Based on 698 ratings

Easy to use

9.08

Easy to read

8.91

Value for money

8.89

OveReview Final Score

How Our Score Is Calculated

Product Description

The interface is easy

It typically lives for more than ten

Makes sure that the towing circuit of the vehicle is configured properly

Questions & Answers

How do the lights indicate the state of each light? I lost the package what does each light mean? Furthermore, I know for sure the 12v light does not light up. Why might that be?

The picture of the tester shows you the The document is marked with everything. The reason your vehicle does not have a 12V light could be due to no ground being connected or no power to the light hook up.

Is the 12 volt system supposed to work through the plug on most new vehicles with a Trailer plug on the back bumper?

(4) of my four have made a contribution. There is a separate 12V power wire for the round 7 blade plug that comes with my vehicles.

I need to know if this works on a motorhome to tow a vehicle. Do you need to check the 12 volt power connection to the 7 blade connect?

In the case that you have a 7 way to plug into, it will work. However, there are some motor homes that are designed differently. This will work for any pickup truck style, but I'm confused about motorhomes. It is my hope that it will help

If you hit the brake pedal, should the brake light come on? The light does come on when it is pressed manually. ?

That should be the case. As for the lights on your truck not lighting up when you push brake, I would check the brake lights on the truck for illumination. If they do, there is a wiring problem somewhere else. There is a fuse for trailer brakes on some trucks. Those are the first places I would look.

Selected User Reviews For IIT 16687 7 Blade & 4 Pin Tester,

To use it, you will need a mirror

3/5

With this tester, I have a problem with the indicator lights being on only one side. When plugged into the connector of my truck, the lights will face the bumper so it will be difficult to see the indicator lights. It is necessary for me to check the status of the lights using a mirror. Depending on how your connector is mounted on your vehicle, this may not be an issue for you. My second issue with this tester is that one of the blades on the 7 pin end has been pushed all the way back on the connector, so it does not make contact with my truck's plug. As I said above, I disassembled the tester and pushed the blade all the way to the front of the plug, as it is on the other testers. In the next use of the tester, I noticed that the same blade was pushed back to the plug. There is a problem with snapping this blade into place. It has been requested that I be replaced. When I receive a replacement for my battery, I will update my review.

Averie Vincent

| May 27, 2021

I would guess 90% of them work but most aftermarket brake controllers have a sleep mode that doesn't activate unless the brake output wire is connected to a large resistance

4/5

If this had 5W worth of resistors, my Redarc Tow Pro Elite would work. In its current state, it is just a simple matter of connecting two wires with an incandescent bulb to test the brakes. I thought about wiring in my own resistors, but honestly if i need to test the brakes, the light bulb method works well.

Reese Lynch

| Jul 05, 2021

The software works but is a bit hard It is hard to see the leds when it is plugged into the 7 pin socket because the leds are in a hard-to-see location

3/5

This makes it almost impossible to see them because they're hidden between the tester and the bottom of the bumper. There would be no need to test the 4 pin plug if they were on the end where the plug is. It would be useful if they were on the end with the 7 pin plug, but that is Even though this will suffice for what I need to accomplish.

Vincenzo Wong

| Oct 28, 2020

A 2017 Audi Q7 cannot be repaired with this method

3/5

Located the 7 Blade electrical towing connector at the back of the SUV and plugged in the tester. Upon turning on my running lights, braking, and annotating the turn signal or hazard lights, the top line of three green LEDs kept flashing at an extremely dim intensity continuously. After checking the circuits with old trailer or car brake/running lights and the "7 Way Blade to 4 Way Flat Trailer Adapter" I was using with U-bolts, I decided to use old trailer or car brake/running light bulbs. A trailer for hauling goods You can see photos here. Using this simple setup, it was confirmed that vehicle towing circuits were in fact working as they should. Based on my experience, I can only assume that, at least on my pickup, the green LEDs on the tester do not provide enough electrical load to enable it to be detected by my SUV and power the relevant blades to function properly. Amazon's highly-regarded free Returns process was used by the tester to return to the company. A big thank you to.

Joyce Underwood

| Aug 11, 2021

In other words, function is more important than It does the job of identifying whether issues are from the tow vehicle side or from the trailer side

3/5

Also, I know it depends on the vehicle, but I had to crawl under the car to see the lights on both the 4 pin and 7 blade connectors. It might be possible to ease this with a better design. Could you make the panel moveable or have double led lights?.

Payton Barron

| Aug 24, 2020

There is a possibility that the manufacturer fixed the indication of light output

5/5

In other reviews, it indicated that the light portion of the pin tester pointed down when indexed to the socket, but the one I purchased has it displayed on top as shown in these reviews. It is a good indicator to ensure the harness and pins are working.

Waylon Quinn

| Apr 18, 2021

I used it for my RV and it works This tool works as advertised

5/5

I used it to check the wiring on a RV trailer. As for the product itself, it was right side up for me, so it had no issues. It seems that those who had it backward either had their plug installed upside down, or the tester, and if the tester is the case, it can be reversed by disassembling Everything appears to be in order.

Mariah Boyle

| Oct 04, 2020

It's what you're looking for

5/5

There is always someone to help you if You can check the trailer plug on your vehicle with this tool. Connectors work for flat 4 pin connectors as well as round 7 blade When they are plugged in, some claim the lights are upside down. As long as your square keyed side is located on top, then I can tell you that the LEDs are also located on top and very visible.

Belle Pineda

| May 18, 2021