help trooper dash lights & tale don't work

:banghead: i just had and harness put in for my hitch and a few days later my dash lights,tail lights went out. My brake lights work. so I check the fuses under my hood I HAVE A 96 IZUSU TROOPER, so i replace the 15 amp fuse for the tail lights. Put evertime I replace it burns out. I thought it was the harnes so I took it of totaly. Still the same effect and no change. What can i due or look for first to find out where the short is happening. Can some one please help? :confused:

Clean up your rear light sockets and replace the bulbs.

Double check your tailer wiring (did you cut into the harness?)

I had a professonal place put my harness on they splice in to my litghts , put i took off the harness and the fuse are still blowing out ever time I turn on the lights. I have also replace the bulbs. and I made sure the wires were not crossing when I took off the harness :grinno: