7 Way Blade Trailer Connector Tester with Red LEDs Indicators Nilight
7 Way Blade Trailer Connector Tester with Red LEDs Indicators Nilight
7 Way Blade Trailer Connector Tester with Red LEDs Indicators Nilight
7 Way Blade Trailer Connector Tester with Red LEDs Indicators Nilight
7 Way Blade Trailer Connector Tester with Red LEDs Indicators Nilight
7 Way Blade Trailer Connector Tester with Red LEDs Indicators Nilight
7 Way Blade Trailer Connector Tester with Red LEDs Indicators Nilight

7 Way Blade Trailer Connector Tester with Red LEDs Indicators

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30 Days Returns

Nilight will accept returns for up to 30 days from the date of purchase. Please include all original items in your return shipment. Incomplete returns may not be eligible for a full refund. Returns within 30 days or purchase will receive a full refund for the purchase price of the product.

No returns will be accepted after 30 days. Nilight will provide a return shipping label upon request.

Non-contiguous US residents and International residents – including Alaska, Hawaii, Canada and Mexico – are responsible for return shipping charges. Refunds will be applied to the original payment method that was used. Refunds are generally issued within 5-10 business days of Nilight receiving all returned goods. Your bank may require additional processing time to reflect the refund in your account.

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2024 Product Guide

About this item

  • Function: Helps you confirm proper vehicle and trailer electrical function. Allows you easily and quickly to diagnose and fix problems of trailer socket circuits, short time to troubleshoot the issue.
  • Multiple Use: For tail lights, brake lights, reverse lights, turn signals, brakes and auxiliary power. Compatible with standard 7-way blade trailer sockets. Delicate figure design make it be carried and stored easily.
  • Quick Identification: Features 6 bright LED indicators. Clear and obvious labeling of each light enable you quickly to identify the working and faulty circuits at a glance.
  • Durable & Sturdy: Plastic body with optimal weather, corrosion, and impact resistance to last for long time use. Nickel-plated copper pins not only increase conductivity but also anti- wear & anti-corrosion.
  • How to Use: Straight forward plug the tester into the tow vehicle, or an adapter, turn on the lights, and check the easy to read LEDS. Package Included: 1 x Trailer Connector Tester, 1 x User Manual.


It works by plugging in the connector socket of your vehicle end and seeing the lights display.

Each of the indicator light with clear labeling to tell you which of your towing vehicle lights work or don't. If socket is getting proper power, the tester's various LEDs will light up. Take this small lightweight tester wherever you go and drive with confidence

  • Compatible with standard 7-way blade trailer sockets
  • LED indicator for circuit continuity tests
  • Plug-N-Play

Functional Labeling :

BU: Back up or reverse circuit center pole

RT: Right turn/brake

T/M: Taillights

BK: Brake controller output

12V: 12-volt power feed

LT: Left turn/brake



Durable Quality

Made to provide excellent impact resistance and corrosion resistance for long-lasting performance. The tester’s compact form is small enough to fit in your hand, while being tough enough to get the job done right.


Comfortable Grip

Simple grip tabs allow for easy plug in and disconnect. Makes testing and troubleshooting easier


Excellent Conductivity

Nickel-plated copper pins add to increased conductivity and optimal wear and corrosion resistance. Fits for most vehicles with 7 pin vehicle-side socket


LED Light Indicator

Features a label for each LED, indicating the intended function. The correct LED will light up if trailer socket circuits is connecting power properly


Nilight Trailer Adapter Off-Road Vehicle Using

Off-Road Vehicle Using

This trailer adapter is widely used in most off-road vehicles with 7-hole connectors. It is small in size and easy to carry.

Nilight Trailer Adapter In RVs Using

RVs Using

This trailer adapter can be used on Fifth Wheel, Travel Trailers, and Truck Camper, etc. Provide tools for unexpected situations on the travel road.

Nilight Trailer Adapter In Truck Using

Truck Using

It is suitable for trailers, tipper trucks, and tow trucks, etc. Suitable for the need to apply trailer signal lights during long-distance transportation.

Nilight Trailer Adapter In Boat Using

Boat Using

This trailer adapter can be installed on boats, yachts, skiffs, freighters, and ships. It is efficiently waterproof, dust-proof, and anti-corrosive.

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Parts ordered must be in stock for the order to ship. Approximately 98% of all orders placed leave our warehouses the same day (not including weekends & holidays). Even with our huge inventory, we may run out of an item. If this is the case you will receive an email with an expected availability date.

DELIVERY DAYS: 2-6 Business Days (More Time and Extra Fee for * Heavy and Big-size Products ) Processing Time: 1-2 Business Day

Free Shipping

Qualifying items receive Free Shipping on all orders. Qualifying orders for Free Shipping are shipped via ground delivery. Free Shipping is only applicable to the continental United States. Excludes Alaska, Hawaii, and Other Countries. Please check the detail page to see if it qualifies for Free Shipping. 

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