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Result: Trailer Circuit Tester

TowSmart Circuit Tester Kit for 4-Pole Flat Trailer Connector

Our Price: $12.69
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

Brophy Circuit Tester for 4-Pole Flat Trailer Connector

Our Price: $15.54
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

Hopkins Endurance Flex Trailer Connector Adapter w/ LED Circuit Tester - 7-Pole to 4-Pole or 5-Pole

Retail: $43.40
Our Price: $22.94
In Stock
This adapter lets you use your 7-way, RV-style connector with a 4- or 5-way flat, trailer-end plug. It includes a circuit tester with red LEDs, and the 5" long, flexible wire between the plugs ...
Features: Adapter converts your 7-pole, blade-style, vehicle-end connector to a 4- or 5-wire flat connector Integrated circuit tester with red LEDs lets you know when wiring is functioning properly
  • Wiring Adapters
  • Hopkins
  • 7 Blade to 4 Flat
  • 7 Blade to 5 Flat
  • Universal Fit

Hopkins Endurance Flex Trailer Connector Adapter w/ LED Circuit Tester - 6-Pole to 4-Pole

Retail: $37.24
Our Price: $22.85
In Stock
This adapter lets you use your 6-way round connector with a 4-way flat, trailer-end plug. It includes a circuit tester with red LEDs, and the 5" long, flexible wire between the plugs makes for ...
Features: Adapter converts your 6-pole round, vehicle-end connector to a 4-wire flat connector Integrated circuit tester with red LEDs lets you know when wiring is functioning properly Flexible wire
  • Wiring Adapters
  • Hopkins
  • 6 Round to 4 Flat
  • Universal Fit

Reese Trailer Connector Adapter w/ LED Circuit Tester and Dust Cover - 7-Pole to 4-Pole or 5-Pole

Retail: $31.30
Our Price: $24.74
In Stock
This adapter lets you quickly convert your 7-way connector for use with a 4-way or 5-way flat trailer-end plug. It includes a circuit tester with red LEDs and a built-in dust cover that protects the ...
Features: Easy-to-use, plastic adapter converts your vehicle's 7-blade, RV-style, vehicle-end connector for use with a 4-wire or 5-wire flat, trailer-end connector Circuit tester with highly
  • Wiring Adapters
  • Reese
  • 7 Blade to 4 Flat
  • 7 Blade to 5 Flat
  • Universal Fit

Tekonsha Trailer Wiring Circuit Tester

Retail: $690.99
Our Price: $443.45
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 ...
battery) connected to the trailer charge circuit Includes charger for the internal battery of the trailer tester Works with 7-way trailer connector Adapters (sold separately) allow use with 4-pole, 5-pole
  • Testers
  • Circuit Tester
  • Tekonsha

Hopkins Trailing Wiring Installation Kit with Circuit Tester and 4-Way Flat Dust Cover

Retail: $21.12
Our Price: $16.95
In Stock
Ideal for rewiring a trailer, this kit contains a 6-12-V LED circuit tester, connectors, ring terminals, zip-ties, ground screws, and more. probe circuit tester 1 Roll of electrical tape 9 Butt connectors 1 Terminal grease packet 2 Self-tapping, hex-head ground screws (20) 5-1/2" Long zip-ties (1) 4-Wire flat dust cover 4 Splice
  • Tools for Wiring
  • Wiring Kits
  • Hopkins
  • Installation Kit

Hook Probe Circuit Tester

Retail: $25.50
Our Price: $13.22
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.Highlights Test 6V and 12V Circuits: Great for automotive and trailer electrical systems Hands-Free Testing: Molded hook locks onto wires so you can work more efficiently 4' Insulated Cord
  • Testers
  • Circuit Tester
  • Performance Tool

Brophy 4- and 5- Way Flat Circuit Tester

Retail: $23.58
Our Price: $22.11
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
  • Brophy
  • Black

Curt LED 5-Way Flat Circuit Tester - Vehicle End

Retail: $12.95
Our Price: $11.46
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 ...
lights indicate which functions are working properly Can be left attached to the circuit to continuously monitor the line between your vehicle and the trailer lighting systems Dust cover keeps connector
  • Testers
  • Circuit Tester
  • Tow Function Tester
  • CURT

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

Our Price: $73.07
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

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

Retail: $32.64
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

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

Retail: $59.17
Our Price: $41.33
In Stock
This circuit tester plugs into the 7-way connector on your truck. LED lights indicate which functions (brake, turn, tail, stop, reverse and 12V) are properly 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
  • Circuit Tester
  • Pollak
  • Black

ZCI Circuit Protected Vehicle Wiring Harness w/ 4-Pole Flat Trailer Connector and Installation Kit

Our Price: $176.98
Install a 4-way trailer connector on your vehicle without cutting or splicing into your wiring. Zero-contact interface sensors identify the current flowing through each wire by simply clamping onto ...
with, and no power draw from your vehicle's wiring system Easily removable and transferrable between different vehicles Circuit tester included to ensure proper setup Includes circuit
  • Trailer Hitch Wiring
  • Vehicle End Connector
  • Tekonsha
  • Hidden
  • Plug-In
  • 4 Flat
  • Converter
  • Universal Fit

Curt 6-Way Round LED Circuit Tester - Vehicle End

Retail: $15.95
Our Price: $10.42
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

LCD Digital Circuit Tester

Retail: $36.87
Our Price: $27.59
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

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

Retail: $6.46
Our Price: $4.13
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

Cordless Circuit Tester

Retail: $34.46
Our Price: $19.65
  • Testers
  • Circuit Tester
  • Performance Tool

ZCI Circuit Protected Vehicle Wiring Harness w/ 4-Pole Flat Trailer Connector and Installation Kit

Retail: $276.00
Our Price: $173.23
In Stock
Install a 4-way trailer connector on your vehicle without cutting or splicing into your wiring. Zero-contact interface sensors identify the current flowing through each wire by simply clamping onto ...
with, and no power draw from your vehicle's wiring system Easily removable and transferrable between different vehicles Circuit tester included to ensure proper setup Includes circuit
  • Trailer Hitch Wiring
  • Vehicle End Connector
  • Tekonsha
  • Hidden
  • Plug-In
  • 4 Flat
  • Powered Converter
  • Universal Fit

Circuit Tester for Curt Brake Controllers

Retail: $220.95
Our Price: $148.74
Tester helps to quickly identify problems in your brake controller wiring. Tests brake controller output voltage, short circuit or overload, and connection to indicate the level of current in each ...
Features: Circuit tester is perfect for troubleshooting brake controller wiring Works with Curt trailer brake controllers Tests output, short circuit or overload, and connection to indicate the level
  • Trailer Brake Controller
  • Testers
  • CURT

7 Way Trailer Connector Vehicle Tester

Our Price: $23.22
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

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

Our Price: $14.88
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

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

Our Price: $21.85
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 ...
Features: Trailer light serves 7 functions Stop light Tail light Turn signal Side marker Side reflex reflector Rear clearance Rear reflex reflector Built-in test lights let you troubleshoot Tail and
  • Tail Lights
  • Side Marker
  • License Plate
  • Rear Reflector
  • Turn
  • Tail
  • Stop
  • Side Reflector
  • Hopkins
  • Red
  • 4-1/2L x 5-3/8W Inch
  • Submersible Lights
  • Square
  • Surface Mount

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

Our Price: $20.49
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 ...
Features: Trailer light serves 6 functions Stop light Tail light Turn signal Side marker Side reflex reflector Rear reflex reflector Built-in test lights let you troubleshoot Tail and stop/turn LEDs
  • Tail Lights
  • Stop
  • Side Reflector
  • Rear Reflector
  • Turn
  • Side Marker
  • Tail
  • Hopkins
  • Red
  • 4-1/2L x 5-3/8W Inch
  • Submersible Lights
  • Square
  • Surface Mount