Oyviny 4 Pin Trailer Extension Cable 8 Feet + 4-Way Flat Trailer Wiring Tester 4 Pin Male and Female Trailer Tester with Bright Indicators

Oyviny 4 way flat male to female trailer wire extension compatible with all types of vehicles equips with 4 way flat trailer connector like trailers, truck, trailers LED lights, tailgate light bars etc. It’s a great way to check whether your trailer wiring was correctly installed with this 4 pin trailer plug circuit tester, simply plug and play design let you know where to check, quickly identify lighting problems. 4 flat tester fits with US standard 4 pin flat trailer connector.

• Trailer 4 Pin Extension. 4 pin flat trailer wire extension with a male and female end, great for extending your trailer lights wire hookup to your vehicle, widely used for all types of trailers with 4 way flat plug like boat trailer, utility trailer and horse trailer
• Stable Connection. This 4 pin trailer wiring extension is 8ft long; Flat 4 wire trailer extension supplys power for trailer taillights, brake lights and turn signals lights
• 4 Way Trailer Tester. Using this 4 pin trailer plug tester to confirm proper function of your vehicle’s trailer wiring harness, excellent for diagnosing trailer light issues, lets you know where in the system there is a problem instead of guessing
• Plug & Play. This 4 pin trailer plug tester is easy to use, just plug the tester into the 4 pin flat trailer connector on your tow vehicle and trailer to test taillights and turn signals for proper operation
• Bright LED Indicators. This 4-way trailer circuit tester features a LED light for each electrical functions, turn on the lights and check, you can easily read the LEDs and find out which wiring has a problem