Thx guys. the trailer harness was installed a long time ago. the problem is actually the connector that the bulb connects to. I noticed it worked a few hours later with the new bulb, then it didnt work later that week. I wiggled it with the lights on and then just taped it with some electrical tape to keep the bulb snug to the connector so everything is fine now. Its gunny because the bulb fits nice and tight in the connector but if you wiggle it, it will go on and off even with it snug in there. I dunno, long as I dont get pulled over when I think my light is good.