This product is used to the trailer power supply wiring whether normal or not. With 7 LED indicators. It is portable and lightweight.

Features:
Trailer tester for 7 pins plug and socket connection.
It can test the trailer power supply wiring whether normal or not.
It has 7 LED indicators.
Can indicate any failure in your wiring on the car or on the trailer.
Small size and portable, easy to carry and use.

Specifications:
Item type: Trailer Tester
Material: ABS plastic
Resistance: 12V
Color: Gold, blue, red wine(optional)
Package weight: 170g / 5.99ounces
Package size: 200 * 50 * 40mm / 7.87 * 1.96 * 1.57inches

7pin lighting connection-cable function:
PIN1-Yellow Wire(Left/Hang Direction Indicator)
PIN 2 - Blue Wire (Rear Fog Lamps)
PIN 3 - White Wire (Earth Return)
PIN 4 - Green Wire (Right/H Direction Indicator)
PIN 5 - Brown Wire (Right/H Tail & No. Plate Lamp)
PIN 6 - Red Wire (Stop Lamp)
PIN 7 - Black Wire (Left/H Tail & No. Plate Lamp)

Package list:
1 * Trailer Tester