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Hopkins Tow Doctor Vehicle End Test Unit - HM50918

Retail: $366.79
Our Price: $261.19
In Stock
Allows one person to check that a vehicle wiring harness has been installed properly and all functions are working Tests all tow vehicle functions: ground, auxiliary power, brake, direction, and
  • Testers
  • Tow Function Tester
  • Hopkins

Curt Echo Wireless Brake Controller - 7-Way Plug-in w/ Bluetooth App - Up to 2 Axles - Proportional

Retail: $432.95
Our Price: $263.30
In Stock
Towing? There's an app for that. This brake controller connects to your phone with Bluetooth so all your settings are right in your hand. The unit plugs into your 7-way for a one-step ...
Built-in reverse polarity and short circuit protection Weather-resistant - Sealed against moisture Specs: Application: trailers with 1 to 2 axles (4 brake assemblies) Compatible with electric trailer brakes
  • Proportional Controller
  • Electric
  • CURT
  • Multiple Trailers
  • Smartphone Display
  • Under-Dash
  • Plug-In
  • Smartphone App

Hopkins Endurance Powered Tail Light Converter w/ 4-Way Flat Trailer Connector and Install Kit

Retail: $114.29
Our Price: $84.82
In Stock
The built-in tester on the 4-way flat in this kit lets you easily troubleshoot. Great for setups with LED or incandescent bulbs, this kit converts your vehicle's lighting system to match your ...
operate on a 3-wire system, wherein the brake signal and the turn signals run on separate wires to illuminate different lights. (Typically, these vehicles have amber turn signals.) But most trailers run on
  • Trailer Hitch Wiring
  • Vehicle End Connector
  • Hopkins
  • Splice-In
  • 4 Flat
  • Powered Converter
  • Universal Fit

7 Way Trailer Connector Vehicle Tester

Our Price: $23.02
In Stock
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 ...
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
  • Testers
  • Tow Function Tester
  • Tow Ready
  • Black

Replacement Tow Doctor Tester

Retail: $637.69
Our Price: $293.25
, left turn, brake, tail, backup lights; electric brakes and auxiliary power Trailer lights illuminate and LED bulbs light on the tester to show function operation Adapts to 4-Flat, 6-Pole Round, or 7-Way
  • Testers
  • Tow Function Tester
  • Hopkins

Tekonsha Powered Tail Light Converter w/ 4-Way Flat Trailer Connector and Install Kit

Our Price: $120.78
In Stock
Great for cars and trailers with either LED or incandescent bulbs, this kit converts your vehicle's lighting system to match your trailer's. It includes a 4-way flat, wire taps, and a power ...
safety in mind Ensures that trailer brake lights override hazard lamps so other drivers know when you're slowing down Guards against electrical shorts and mis-wire situations Splices into your
  • Trailer Hitch Wiring
  • Vehicle End Connector
  • Tekonsha
  • Visible
  • Splice-In
  • 4 Flat
  • Powered Converter
  • Universal Fit

New Arrivals — From Our Shop to You!

Chosen by folks who live and breathe this, just like you.

New Arrivals — From Our Shop to You!

Chosen by folks who live and breathe this, just like you.

Kristin
Kristin etrailer team member
Kristin etrailer team member

15

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589

Installations

15,864

Customers Helped

Any questions? Chat us from Missouri

Curt Powered Tail Light Converter w/ 4-Way Flat Trailer Connector and Install Kit

Our Price: $162.77
In Stock
Great for cars and trailers with either LED or incandescent bulbs, this kit converts your vehicle's lighting system to match your trailer's. It includes a 4-way flat, wire taps, and a power ...
separate wires to illuminate different lights. (Typically, these vehicles have amber turn signals.) But most trailers run on a 2-wire system, which means the brake and turn signals travel along a single wire
  • Trailer Hitch Wiring
  • Vehicle End Connector
  • CURT
  • Splice-In
  • 4 Flat
  • Powered Converter
  • Universal Fit

Tekonsha Trailer Wiring Circuit Tester

Retail: $690.99
Our Price: $442.53
In Stock
This tester helps you to quickly identify problems in your trailer wiring. It tests the left turn, right turn, tail/marker, brake and backup circuits to indicate the level of current in each circuit ...
Features: Helps to quickly identify problems in your trailer wiring Tests the left turn, right turn, tail/marker, brake and reverse light circuits on the trailer Works with incandescent and LED
  • Testers
  • Circuit Tester
  • Tekonsha

Tekonsha Tail Light Converter with 4-Way Flat Trailer Connector and Install Kit

Our Price: $43.11
In Stock
Great for cars and trailers with either LED or incandescent bulbs, this tail light converter has a 60" 4-way flat harness. Designed for vehicles that have amber turn signals. Includes wire taps ...
to illuminate different lights. (Typically, these vehicles have amber turn signals.) But most trailers run on a 2-wire system, which means the brake and turn signals travel along a single wire
  • Trailer Hitch Wiring
  • Vehicle End Connector
  • Tekonsha
  • Hidden
  • Splice-In
  • 4 Flat
  • Converter
  • Universal Fit

Hopkins Powered Tail Light Converter w/ 4-Way Flat Trailer Connector for Negative Input Vehicles

Retail: $106.09
Our Price: $78.44
In Stock
Convert your vehicle's lighting system to match that of your trailer with this kit. It includes a 60" 4-way flat harness, wire taps, and a power wire that pulls power directly from your ...
trailers run on a 2-wire system, which means the brake and turn signals travel along a single wire. You'll notice that, on your trailer, the brake light will flash for the turn signals. If your vehicle
  • Trailer Hitch Wiring
  • Vehicle End Connector
  • Hopkins
  • Splice-In
  • 4 Flat
  • Powered Converter
  • Universal Fit

TowSmart Circuit Tester Kit for 4-Pole Flat Trailer Connector

Our Price: $11.97
In Stock
You're chasing a light issue with no clue if it's the truck or trailer. You plug in the tester, hit the blinkers, and the LEDs show what's live. No guesswork. Just answers before you ...
Highlights 4-Way Circuit Tester: Checks power output on standard 4-flat vehicle connectors. Instant LED Feedback: Lights up to show turn signals, brake lights, and running lights. Plug-In Design: No
  • Testers
  • Circuit Tester
  • Tow Function Tester
  • TowSmart

Modulite Circuit Protected Power Converter w/ 5-Way Flat, Hardwire Kit, and Tester

Our Price: $72.54
In Stock
Modulite Protector with Integrated Circuit & Overload Protection, Hardwire Kit and Tester circuit and overload protection The trailer brakes will override the hazard lamps when the brake is activated Designed not to send feedback through vehicle circuits Upgraded circuitry works with vehicles
  • Trailer Hitch Wiring
  • Vehicle End Connector
  • Tekonsha
  • Splice-In
  • 5 Flat
  • Powered Converter
  • Universal Fit

TowSmart ProClass 7-Blade Trailer Connector w/ Jacketed Cable, Wire Tester - 72" Long

Retail: $59.99
Our Price: $49.00
In Stock
You're rewiring a trailer from scratch or cleaning up a mess of splices. This 7-way gives you a fresh cable, sealed jacket, and built-in test lights. You wire it once, plug it in, and know its ...
Highlights 7-Blade Connector: Standard plug for trailer lights, brakes, and 12V power. LED Tester Built In: Lights confirm signal function during hookup. Jacketed Cable: Sealed 72" wiring
  • Trailer Connectors
  • Trailer End Connector
  • TowSmart
  • 7 Blade

TowSmart ProClass 7-Blade Trailer Connector w/ Wire Tester - Trailer End

Retail: $36.99
Our Price: $27.17
You're wiring up a trailer and need to know it's done right. This 7-way plug lights up to show which signals are live the second you connect. You crimp it, test it, and roll out knowing ...
Highlights 7-Blade Connector: Standard trailer-end plug for lights, brakes, and power. Built-In LED Tester: Confirms active signals during hookup. Screw Terminals: Accepts blunt-cut wires for easy
  • Trailer Connectors
  • Trailer End Connector
  • TowSmart
  • 7 Blade

Brophy Circuit Tester for 4-Pole Flat Trailer Connector

Our Price: $14.98
In Stock
Circuit tester plugs into your 4-way flat trailer wiring harness and identifies lighting problems. Labeled LED lights illuminate to show which functions are working properly.Features: Circuit tester plugs into your trailer's wiring harness to check the conductivity of all the circuits between your vehicle and your trailer Quickly identifies lighting problems Labeled
  • Testers
  • Circuit Tester
  • Tow Function Tester
  • Brophy
  • Black

TowSmart 4-Way Flat Trailer Connector w/ Wire Tester - Trailer End - 24"

Our Price: $11.55
In Stock
The trailer lights are flickering again. You've replaced bulbs, checked grounds, and still no luck. Time to swap the plug. This 4-way flat connector comes with a built-in tester and 24 inches of ...
Highlights 4-Way Flat Plug: Standard trailer-end connector. 24" Bonded Wire Lead: 18-gauge wire for stop, turn, and taillights. Built-In Wire Tester: Lets you verify light function during
  • Trailer Connectors
  • Trailer End Connector
  • TowSmart
  • 4 Flat

TowSmart Harness with 4-Pole Flat Connector - Wire Tester, Ergo Grip - Trailer End - 12"

Our Price: $14.45
In Stock
You're hooking up the trailer and the lights are dead. Could be the truck, could be the plug. This harness tells you fast. Built-in LEDs show what's live, and the grip makes it easy to ...
Highlights 4-Way Flat Connector: Standard trailer-end wiring harness. Built-In LED Tester: Confirms active signals during hookup. Ergo Grip Handle: Makes connecting and disconnecting easier
  • Trailer Connectors
  • Trailer End Connector
  • TowSmart
  • 4 Flat

Curt LED 5-Way Flat Circuit Tester - Vehicle End

Retail: $12.95
Our Price: $10.67
In Stock
This circuit tester plugs into the 5-way trailer connector on your vehicle. The bright LED lights indicate which functions (tail lights, brake lights, turn signals, and reverse lights) are working ...
Features: 5-Way connector tester plugs into your vehicle's wiring harness to confirm your lights are functioning Tests tail lights, brake lights, turn signals, and reverse lights Labeled LED
  • Testers
  • Circuit Tester
  • Tow Function Tester
  • CURT

Curt Powered Tail Light Converter w/ 4-Way Flat Trailer Connector and Install Kit

Our Price: $93.34
Built to last, this kit, made with surface-mount technology, converts your vehicle's lighting system to match your trailer's. It includes a 60" 4-way flat harness, wire taps, and a power ...
vehicles have amber turn signals.) But most trailers run on a 2-wire system, which means the brake and turn signals travel along a single wire. You'll notice that, on your trailer, the brake light will
  • Trailer Hitch Wiring
  • Vehicle End Connector
  • CURT
  • Splice-In
  • 4 Flat
  • Powered Converter
  • Universal Fit

Curt Powered Tail Light Converter w/ 4-Way Flat Trailer Connector and Install Kit

Our Price: $72.81
In Stock
Built to last, this kit, made with surface-mount technology, converts your vehicle's lighting system to match your trailer's. It includes a 60" 4-way flat harness, wire taps, and a power ...
different lights. (Typically, these vehicles have amber turn signals.) But most trailers run on a 2-wire system, which means the brake and turn signals travel along a single wire. You'll notice that, on
  • Trailer Hitch Wiring
  • Vehicle End Connector
  • CURT
  • Visible
  • Splice-In
  • 4 Flat
  • Converter
  • Universal Fit

Hopkins Tail Light Converter with 4-Way Flat Trailer Connector

Retail: $48.60
Our Price: $30.72
In Stock
Great for cars and trailers with either LED or incandescent bulbs, this tail light converter has a 72" 4-way flat harness. Designed for vehicles that have amber turn signals. Installation ...
a 3-wire system, wherein the brake signal and the turn signals run on separate wires to illuminate different lights. (Typically, these vehicles have amber turn signals.) But most trailers run on a
  • Trailer Hitch Wiring
  • Vehicle End Connector
  • Hopkins
  • Splice-In
  • 4 Flat
  • Converter
  • Universal Fit

Hopkins Powered Tail Light Converter w/ 4-Way Flat Trailer Connector and Install Kit

Retail: $106.59
Our Price: $69.62
In Stock
This kit converts your vehicle's lighting system to match that of your trailer's. Includes a 4-way flat, 57" harness, wire taps, and a power wire that pulls power directly from your ...
operate on a 3-wire system, wherein the brake signal and the turn signals run on separate wires to illuminate different lights. (Typically, these vehicles have amber turn signals.) But most trailers run on
  • Trailer Hitch Wiring
  • Vehicle End Connector
  • Hopkins
  • Splice-In
  • 4 Flat
  • Powered Converter
  • Universal Fit

Hopkins Tail Light Converter with 4-Way Flat Trailer Connector

Retail: $39.32
Our Price: $28.87
In Stock
This tail light converter with a 72" 4-way flat harness converts your vehicle's lighting system to match your trailer's. Designed for vehicles that have amber turn signals. Installation ...
turn signals run on separate wires to illuminate different lights. (Typically, these vehicles have amber turn signals.) But most trailers run on a 2-wire system, which means the brake and turn signals
  • Trailer Hitch Wiring
  • Vehicle End Connector
  • Hopkins
  • Splice-In
  • 4 Flat
  • Converter
  • Universal Fit

Hopkins Tail Light Converter with 4-Way Flat Trailer Connector

Retail: $32.99
Our Price: $24.26
In Stock
This 60" harness has a lighting converter built into the 4-way flat plug so you don't have to worry about mounting a separate box. Designed for vehicles that have amber turn signals. Installation hardware sold separately. system, wherein the brake signal and the turn signals run on separate wires to illuminate different lights. (Typically, these vehicles have amber turn signals.) But most trailers run on a 2-wire system
  • Trailer Hitch Wiring
  • Vehicle End Connector
  • Hopkins
  • Splice-In
  • 4 Flat
  • No Converter
  • Universal Fit