Review on Partsam 12V LED Low Profile Rectangular Trailer Light Kit: Waterproof, Sealed Stop Turn Tail Lights with License Plate Brake Running Lights and 25ft 4pin Wiring Harness & Bracket by Chris Long

I bought these to install on my boat trailer. I have installed trailer lights and wiring harnesses many times. When I opened the box I noticed 2 things. First, the wires on the right side headlight did not match the wires in the wire harness that came with the headlights. Second, there were no instructions to tell which wires corresponded to which colors. I connected the left one (very easy, all wires match). The tested lamp worked correctly, the right side connected and the lamp did not light up. I've tried all color combinations and it still doesn't work. So I tried the lamp with a 12V battery for direct current. The lamp still did not light up in any color combination when switched on and grounded. Long story short, 1 defective bulb, mismatched wiring harness to bulbs and no instructions (which are not needed to adjust the wiring harness).