I have a 98 Peterbilt 379. Left turn signal doesn't work, right one works fine and the 4ways work. LED everything for lights. I've checked grounds and tried 2 different flashers and put in a new turn signal switch, have a wiring diagram, following the diagram and according to the diagram there is a left and right relay after the turn signal switch, maybe I'm an idiot but I cant seem to find them. Are there relays just for the turn signals? I have good 12 volts coming into the flasher, good flashing for right but when I back prob for the left it flashes weird but kind of works, but when it starts doing that I can turn the signals off and the flasher still clicks, but no lights flash.