I have an '04 Nissan Frontier. Last night I bought a T-Connector wiring harness from Auto Zone. The wiring harness was designated to fit a '98-'03 Frontier. The frontier didn't change until '05, so myself and the Auto Zone parts guy assumed that it would fit fine. Everything matched up, all the connectors fit exactly, but the trailer lights won't work. The trailer has always been so-so with the lighting ( I don't know why) but the trailer is about 10 years old. Anyway, my question is, if all of the connectors fit, matched up, etc., do you guys think its the trailer? I went to U-Haul this morning and the guy said that if everything fit, it must be the trailer. The guy was pretty rude like he didn't want to be there or something, so I wasn't sure. I wanted to ask guys that actually pulled a trailer, because i doubt he hauls much behind his Kia. Thanks Guys!