4 Pin Trailer Lights. The first thing you need to do is make sure that your connector works properly. LEDGlow's Tailgate Light Bar Y-Splitter Harness gives you the flexibility to utilize multiple connections through one easy-to-use harness for the purpose of powering your tailgate light bar and trailer lights.
The first thing you need to do is make sure that your connector works properly.
Some of the lights were out, but the light bulbs were fine.
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To start, every trailer needs lights — brake lights, turn signals, and tail lights. LEDGlow's Tailgate Light Bar Y-Splitter Harness gives you the flexibility to utilize multiple connections through one easy-to-use harness for the purpose of powering your tailgate light bar and trailer lights. To make sure everything added up, I connected the negative lead of my multimeter to the ground (the body of the car), and touched the pins to measure if the voltage changed when I was using the function (break.