Just installed 2 of those 118354 harnesses from etrailer.com. Pricy at 64 but I started over with my wiring and wanted both xj's with hitches done the same. I found that although my 98 had a 4 pole plug hanging down the wiring was a mess. better to start over. I also rewired the trailer and after reading several articles, I grounded the trailer in 3 different spots. May be overkill, but I want the lights to work.