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Curt 7-Way to RV Socket LED Circuit Tester - Vehicle End

Retail: $30.42
Our Price: $19.90
In Stock
This circuit tester plugs into the 7-way connector on your vehicle. LED lights indicate which functions (brake, turn, tail, stop, reverse, electric brakes, and 12V) are properly working. Color-coded ...
Features: 7-Way connector tester plugs into your vehicle's wiring harness to confirm your lights are functioning Tests tail lights, brake lights, turn signals, reverse lights, electric brakes
  • Testers
  • Circuit Tester
  • Tow Function Tester
  • CURT

Hopkins Tow Doctor Trailer End Test Unit - HM50928

Retail: $637.69
Our Price: $499.07
In Stock
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 RV Blade Includes battery terminal clips Amperage meter shows
  • Testers
  • Tow Function Tester
  • Hopkins

Curt LED 4-Way Flat Connector (Vehicle End) Tester

Retail: $19.06
Our Price: $6.87
In Stock
Curt LED 4-Way Flat Connector Tester This circuit tester plugs into the four-way trailer connector on the vehicle. The bright LED lights analyze the trailer connections and indicate which functions
  • Testers
  • Tow Function Tester
  • Black
  • CURT

LCD Digital Circuit Tester

Retail: $38.72
Our Price: $26.24
In Stock
Features: Economy LCD Circuit Tester with LED back light Ideally used to detect power, voltage, ground, and circuit integrity Surge protected circuitry displays DC voltage from 3V to 48V (±0.3V
  • Testers
  • Circuit Tester
  • Performance Tool

Hopkins Smart Light Trailer Tail Light w Testers - 6 Function - Submersible - Passenger's Side

Our Price: $19.98
In Stock
4-1/2" x 5-3/8" Square trailer tail light is submersible. Integrated LEDs indicate if there's a fault in your trailer wiring. For trailers less than 80" wide. Includes ...
; apart on center Wire configuration: White: ground Red: stop/turn light Black: tail light Harness length: 10" 10-Year limited warranty Built-In LED Testers Verify Connection The Hopkins Smart Light
  • Tail Lights
  • Side Reflector
  • Side Marker
  • Turn
  • Rear Reflector
  • Stop
  • Tail
  • Red
  • Hopkins
  • 4-1/2L x 5-3/8W Inch
  • Submersible Lights
  • Square
  • Surface Mount

Hopkins Smart Light Trailer Tail Light w Testers - 7 Function - Submersible - Passenger's Side

Our Price: $21.28
In Stock
4-1/2" x 5-3/8" Square trailer tail light is submersible. Integrated LEDs indicate if there's a fault in your trailer wiring. For trailers more than 80" wide. Includes ...
studs: 2" apart on center Wire configuration: White: ground Red: stop/turn light Black: tail light Harness length: 10" 10-Year limited warranty Built-In LED Testers Verify Connection The Hopkins
  • Tail Lights
  • Rear Reflector
  • License Plate
  • Side Marker
  • Turn
  • Tail
  • Stop
  • Side Reflector
  • Red
  • Hopkins
  • 4-1/2L x 5-3/8W Inch
  • Submersible Lights
  • Square
  • Surface Mount

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

Years

|

589

Installations

15,864

Customers Helped

Any questions? Chat us from Missouri

Tekonsha Trailer Wiring Circuit Tester

Retail: $690.99
Our Price: $435.51
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

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

Retail: $114.29
Our Price: $85.84
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 ...
tester lights on the connector indicate if each function is working properly Resists damage from dust and humidity Includes durable, molded-rubber, female output socket with protective dust cover Specs
  • Trailer Connectors
  • Vehicle End Connector
  • Hopkins
  • 4 Flat
  • 6 - 10 Feet Long

Hook Probe Circuit Tester

Retail: $25.50
Our Price: $11.55
In Stock
From under-dash tangles to trailer wiring headaches, this circuit tester helps you zero in on electrical issues fast. It hooks on, lights up, and powers through the job without slowing you down. and easy to take on the go Features to know about Test Light for Everyday Diagnostics Perfect for checking fuses, wires, and connectors, this tester helps you quickly track down power issues in 6V and
  • Testers
  • Circuit Tester
  • Performance Tool

Curt LED 5-Way Flat Circuit Tester - Vehicle End

Retail: $11.61
Our Price: $7.94
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

Hopkins Endurance Easy-Pull 4-Way Flat Connector w/ 48" Harness and LED Tester

Retail: $20.60
Our Price: $10.99
In Stock
Built-in LEDs on this 4-way flat connector help you troubleshoot problems. The large grip ring provides the leverage you need to easily disconnect it from your trailer connector without damaging the terminals. Includes dust cover. connector is receiving power from your tow vehicle. Just plug the connector into the 4-way flat on your trailer. No separate circuit testers are needed. Activate each function on your vehicle and a red light
  • Trailer Connectors
  • Vehicle End Connector
  • Hopkins
  • 4 Flat
  • 0 - 5 Feet Long

Replacement Tow Doctor Tester

Retail: $637.69
Our Price: $290.58
In Stock
, 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

Brophy Circuit Tester for 4-Pole Flat Trailer Connector

Our Price: $14.66
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
  • Black
  • Brophy

Curt 6-Way Round LED Circuit Tester - Vehicle End

Retail: $12.95
Our Price: $8.90
In Stock
This circuit tester plugs into the 6-way connector on your vehicle. LED lights indicate which functions (brake, turn, tail, electric brakes, and 12V) are properly working.Features: 6-Way connector tester plugs into your vehicle's wiring harness to confirm your lights are functioning Tests tail lights, brake lights, turn signals, electric brakes, and auxiliary
  • Testers
  • Circuit Tester
  • Tow Function Tester
  • CURT

Performance Tool W2973C 6/12V Circuit Tester 'n Probe Light for Cars, Trucks, Tractors & RVs

Our Price: $7.95
In Stock
Quickly check circuits and wire function with this Performance Tool 6 to 12V tester. Designed for automotive electrical systems, it features an insulated piercing probe and an alligator-clip lead for ...
Ideal for diagnosing automotive wiring, fuses, and electrical functions Specs: Application: Automotive 6V and 12V electrical systems Tester type: Piercing probe circuit tester Test lead: Integrated with
  • Testers
  • Circuit Tester
  • Performance Tool

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

Our Price: $40.41
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 ...
turn Brown Tail lights and parking lights Red Brakes White Ground Yellow Left turn Tail Light Converter Installation To begin the installation, use the included circuit tester to double-check the
  • Trailer Hitch Wiring
  • Vehicle End Connector
  • Hidden
  • Tekonsha
  • Splice-In
  • 4 Flat
  • Converter
  • Universal Fit

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

Our Price: $162.82
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 ...
Features: Provides a 4-way flat trailer connector at the back of your vehicle to power your trailer's signal lights Compatible with 5-pole, 6-pole, and 7-pole adapters (sold separately) Ensures
  • Trailer Hitch Wiring
  • Vehicle End Connector
  • CURT
  • Splice-In
  • 4 Flat
  • Powered Converter
  • Universal Fit

Brophy 4- and 5- Way Flat Circuit Tester

Retail: $23.62
Our Price: $21.30
In Stock
This Brophy electrical tester works for both 4- and 5- way flat trailer wiring harnesses.Features: 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 Can be left attached to
  • Testers
  • Circuit Tester
  • Tow Function Tester
  • Black
  • Brophy

Hopkins Smart Light Trailer Tail Light w Test Lights - 8 Function - Submersible - Driver's Side

Our Price: $23.46
In Stock
4-1/2" x 5-3/8" Square trailer tail light is submersible. Integrated LEDs indicate if there's a fault in your trailer wiring. For trailers more than 80" wide. Includes ...
; deep Mounting studs: 2" apart on center Wire configuration: White: ground Red: stop/turn light Black: tail light Harness length: 10" 10-Year limited warranty Built-In LED Testers Verify
  • Tail Lights
  • License Plate
  • Rear Clearance
  • Side Reflector
  • Stop
  • Rear Reflector
  • Tail
  • Side Marker
  • Turn
  • Red
  • Hopkins
  • 4-1/2L x 5-3/8W Inch
  • Submersible Lights
  • Square
  • Surface Mount

Hopkins Smart Light Trailer Tail Light w Test Lights - 7 Function - Submersible - Driver's Side

Retail: $50.53
Our Price: $20.87
In Stock
4-1/2" x 5-3/8" Square trailer tail light is submersible. Integrated LEDs indicate if there's a fault in your trailer wiring. For trailers less than 80" wide. Includes ...
: 2" apart on center Wire configuration: White: ground Red: stop/turn light Black: tail light Harness length: 10" 10-Year limited warranty Built-In LED Testers Verify Connection The Hopkins Smart
  • Tail Lights
  • License Plate
  • Turn
  • Side Marker
  • Side Reflector
  • Stop
  • Rear Reflector
  • Tail
  • Red
  • Hopkins
  • 4-1/2L x 5-3/8W Inch
  • Submersible Lights
  • Square
  • Surface Mount

Hopkins Tail Light Converter with 4-Way Flat Trailer Connector

Retail: $48.60
Our Price: $32.91
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 ...
To begin the installation, use a circuit tester (sold separately) to double-check the function of each wire on your vehicle's tail light wiring harness. The color/function of the splice-in wires on
  • Trailer Hitch Wiring
  • Vehicle End Connector
  • Hopkins
  • Splice-In
  • 4 Flat
  • Converter
  • Universal Fit

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

Our Price: $73.32
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 ...
. To begin the installation, use a circuit tester (sold separately) to double-check the function of each wire on your vehicle's tail light wiring harness. The color/function of the splice-in wires on
  • Trailer Connectors
  • Vehicle End Connector
  • CURT
  • 4 Flat
  • 0 - 5 Feet Long

Curt Tail Light Converter with 4-Way Flat Trailer Connector

Retail: $45.02
Our Price: $25.40
Built to last, this tail light converter with a 76" 4-way flat harness is made using surface-mount technology. Designed for vehicles that have amber turn signals and incandescent bulbs. Includes ...
Converter Installation To begin the installation, use a circuit tester (sold separately) to double-check the function of each wire on your vehicle's tail light wiring harness. The color/function of the
  • 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: $108.02
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 ...
doesn't get overloaded. To begin the installation, use a circuit tester (sold separately) to double-check the function of each wire on your vehicle's tail light wiring harness. The color/function of the
  • Trailer Hitch Wiring
  • Vehicle End Connector
  • CURT
  • Splice-In
  • 4 Flat
  • Powered Converter
  • Universal Fit