Re: Getting Ezloader 17'-20' trailer to pass inspection
Just for fun I'll give it a try, forgive me if I start too slow;<br /><br />4-pin trailers can receive only three signals, <br />- running lights (which are dim bulbs in both tail-light assemblies, and maybe some other marker lights, and maybe a licence illuminator),<br />- left turn / stop (which is a bright bulb in the left tail-light assembly), and<br />- right turn / stop (which is a bright bulb in the right tail-light assembly)<br /><br />Turn signals work by flashing the individual bright bulbs, stop works by turning both bright bulbs on; the point here is that the trailer directs turn signal and stop light information into the same bulb. (the dim and bright bulbs are actually only separate filaments inside the same glass bulb but that doesn't change the concept)<br /><br />Many cars aren't wired this way, they have completely separate bulbs for turn and stop. That means that the car is giving four separate signals (running, stop, left turn, right turn) but the trailer is only capable of receiving three separate signals (running, left turn/stop, right turn/stop). So, to make a 4-pin trailer light set work with some cars (like my Mazda Mystere) you need a piece of electronics that converts the cars instructructions into something the trailer can process.<br /><br />I just finished installing this converter on the Mystere. Here in Canada they're not easy to find but U-haul has them on the shelf for $20.95, they're called two-to-three wire adapters. One side has five wires you connect in the car to ground, running, left turn, right turn, stop and the other side has the standard 4-pin connector already wired to it.<br /><br />Hope this clarified rather than the opposite!