Well, here goes. I'll explain as best I can. With the forward side marker lite plugged in, only 1 tail lite will work, on the right side & nothing else such as the 3 bar. If I unplug the marker lite, all the lites will work., except for the left side tail lite which needs to be replaced. I also have no brake lites or signals. Anyone have any ideas? I have a 4 pin connector.