I've been working on a little "project trailer" for my 4-wheeler and turned out making it street legal. I bought a Blazer wiring kit and installed it per instructions but I am having some troubles. When I plug in the lights and turn the blinker on the tail light (say right side) blinks, but if I push the brake all the lights come on and blink opposite of the cars lights. If I turn the car headlights on all the lights come on, but they all blink when I turn the blinker on. If I push the brake all the lights go out. I have no clue what I did wrong! The only car that they work right on is our '99 Suburban. On our other cars the lights do as described above. I think that none of the other vehicles are grounded, because the others are from the '70s and my dad did the wiring himself. None of our other 5 trailers do this on any of the vehicles and they have similar wiring. I think all the problems are coming from the amber side marker. Sorry for the long post, any comments would help.