2003 Road King Classic aftermarket LED rear turn signals not working
 

I have installed new fiberglass baggers on my bike and the fender has the long LED lights used for brake/running/turn signals. I have the running and the brake lights working but can't figure out why my turn signals aren't working, there are only 3 wires on the back of the new lights (red,black,white)...has anyone else had this problem? And what are some suggestions on what to try...
Thank you for any help!