Oyviny Custom 4 Pin 56094 Trailer Wiring Harness for 2010-2017 GMC + Double End Design 4 Pin Trailer Light Tester

This custom-fit Plug-in 4 Way Flat Trailer Wiring Harness plugs into your vehicle's wiring harness, provides a 4-way flat trailer connector at the back of your Jeep TJ to power your trailer's signal lights. 4 Way Flat Trailer Light Tester 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 Hitch Wiring Harness for Terrain and Equinox. This 4 way flat wiring harness kit fits for GMC Terrain 2010-2017, for Chevrolet Equinox 2010-2017. Quickly and easily install a 4-way trailer connector on your vehicle
• Standard 4 Way Connector. 4-flat plug is compatible with a wide variety of trailers, adding versatile towing options for your vehicle. 4-way trailer wiring can be used to connect trailer tail lights, brake signal lights and turn signals
• Easy Installation. This Terrain trailer harness comes ready to plug into the existing plugs on your vehicle and trailer, No cutting and splicing required! Effective Time Saving! 80 inches long wiring harness length offer more flexibility
• 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
• 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