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You have a short. One of the wires is grounding out or your fuses are blown. Check the fuses under the drivers side dashboard (by your left knee) with a test light. If you look at the top of each fuse you'll see a number (10, 15, 25...) on either side of that number you will see two strips of metal. Turn the vehicle on and attach the alligator clip to a ground (Bolt, Door frame...). Touch the pointed end to each strip of metal on each fuse. If the test light "lights up" the fuse is good. If not, replace the fuse with the exact number on the new fuse. If you're fuses are good, then you have an electrical short somewhere and you need a pro mechanic or electrician to find the short and fix it. If you find a "Blown fuse" and you replace it and the new fuse blows then you know you have a short. Good luck. check fuses or look for a broken wire

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Q: Tail lights and brake lights and backup lights don't work at all?
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