Now my trucks back lights are screwing up. One night, when I turn on my lights, I looked in the back and saw my rears were only working when the brake was on. otherwise, they never turned on at all. Not to mention my dash lights went out too. So, today, I look at all the fuses, and nothing is blown. so I switch one of the bulbs.. and it works.... for a while. But now, everything blinks no matter what direction I put the blinkers in. the truck has been kinda overwired by it's previous owner. He did a lousy job at it too.. any suggestions?