What Flannelman said <img src="/forums/images/graemlins/smile.gif" alt="" />
Try disconnecting it, pop a new fuse in, and flip the turn signal on and see what happens.

BTW - Northern Tool has a great selection of trailer stuff. I seem to recall them having the entire direct plug in kit for the T100's, as well as just the converter boxes themselves. Or you can eBay them as well.

<img src="/forums/images/graemlins/cheers.gif" alt="" />