Tail light problems

I put new taillights in my 2008 Toyota Tacoma 4-door. My taillights weren't workin before and now they aren't either. There LED so there are no bulbs. My turning signals did work, then while trying to fix the issue I have, the right turn signal works, but not the left. It makes my lights one dashboard flick on and off when I uses the left turn signal. I'm think maybe put in wrong way or a short in the wire some where, I've blown two fuses trying to fix it. Brought it to a Toyota dealership and they had no idea what they were lookin at, gonna try to bring it to another aumotive place, they put my stereo in maybe they can make headway. Was looking for any tips or if y'all know of anything I could try out.Also outing in new headlights and foglights with LEDS and halos if y'all have any tips on putting the LED wiring kits in? Thanks for anyone reading this, know it's long, but don't know what to do.