4-Way Flat Tester

4-Flat tester verifies taillight, right turn, and left turn functions.

With the ability to instantly check for connection and run on all types of trailers including 5th wheel, camper, UHAUL, or lighting accessory, this adapter guarantees 100% rear light functionality on your Chevrolet, Ford, Dodge, RAM, or GMC with any factory OEM 7 Pin plug.

7-Way Round to 4-Way Flat Pin Adapter for Trailer Tow Hitch & Redline Tailgate LED

Eliminate Down Time and Frustration, No need to go to an expensive repair shop to have you trailer harness checked. Our easy-to-use circuit tester

4-Way Flat Trailer Wiring Tester [Nickel-Plated Copper Terminals] [Male & Female] [Continuity Test] 4-Pin Trailer Light Wire Circuit Tester

7-Way RV Blade to 4-Way Flat Plug-In Solution LED Adapter (15174)

Only need the 4-way?. Want a 7-way?. Tests 6 separate trailer light functions. Easily and quickly test trailer circuits on most RV, trucks. Fits 4-way

4 Way flat 7 way round trailer tester 2 PC portable light circuit functions plug

CURT 58260 4-Way Flat Connector Tester

CURT Electrical Adapter with Tester (7-Way RV Blade Vehicle to 4-Way Flat Trailer), 57245 at Tractor Supply Co.

Circuit Tester 4-Way Flat (30178)

The struggle for disconnecting 4 flats is over with the Hopkins Towing Solutions 48138 Endurance Easy-Pull LED Test 4-Flat Trailer Side. A finger loop provides advanced ergonomics and makes connecting and disconnecting a breeze. LED lights on the trailer connector test each electrical function. You'll be on the road in no time with this 4-flat trailer side.

Hopkins Endurance Easy-Pull 4-Flat 12 in. LED Test Trailer Side Connector 48138

Hopkins Electronic Trailer Wiring Test Er 4-Way Flat - 48655 - Speed Addicts

Curt Electrical Adapter Adapts 4-Way Flat to 6-Way Round 57626

Curt Manufacturing 58261: Circuit Tester, Trailer Wire Tester, 4-Way Flat Connector, Each - CURT LED connector testers analyze taillight, turn signal, and ground connections. They come with LED lights to be bright and long-lasting. Part of towing responsibly is making sure your trailer lights are working properly. Let CURT help confirm proper function of vehicle-side wiring connectors.