Review on 🚦 14x Trailer Marker Light 4x2 Rectangle LED Lights 10 Diodes Double Bullseye LED Light Red/Amber 12V Side Marker Light Indicators Surface Mount RV Camper Trucks IP67 Waterproof DOT Certified" - optimized product name. by Brad Bowers

It would have saved me a few hours of frustration chasing down connections that didn't work the first time if the seller had put a reminder in the box, that the LEDs burn sensitive to polarity; that they only work with a specific connection. The bulbs I replaced had the same colored wires and when I installed the LED bulbs I wasn't careful and only connected one correctly the first time. It took some time, but finally it dawned on me that these are diodes that only allow current to flow in one direction. I flashed everything just like the right thing and voila it deserved it. General light is ok.