LED trailer lights

[Moe]

I haven't looked all through the forum to see if this has ever been covered but here goes. First: Many for the manufactures of rear lights for trucks and trailers have mounting/hole patterns that are the same throughout the industry whether it be Grote/Peterson/Trucklite and a couple dozen more. That goes for marker lights also. The basic difference in the manufacters products will most likely be the number of LED's used. Some use as few as 3 LEDs and some more than 12 and the lens they use will make up for the difference. The only lights that are a problem are those used by manfactures of emergency vehicles and motor homes/travel trailers and import trucks, Isuzu/Hino and the like. They seem to buy what is the cheapest from offshore and make them different so no one else can sell replacements.
Next when you use LED lights on the trailer on older tow vehicles you may experience a problem with turn signals not flashing properly. A couple answers to that problem. In some cases you can get an aux flasher made for LED lights to solve that issue. If not you may have to add a load resistor to each light (6ohm/50watt) to simulate a filament bulb (2amp load). With newer vehicles using LED's in their rear lamps that probably won't be an issue.