need some wiring help
My electrical system is developing a mind of it's own. When I got it the wiring for the brake lights was disconnected at the pedal switch so I got some new round NAS style tail lights and wired everything up. Now when the lights are off and i depress the brakes the brake lights work but the headlights come on ever so dimly and the "headlight indicator light" lights up in the dash. I turn on the headlights, brake lights don't work anymore. Here is the cooky thing, when the lights are on and I turn off the key all the power goes off, lights and stereo but the motor wont shut down. I turn the key back on, turn off the lights and turn the key off and it works properly???..... WTF... I get it there is a ground problem somewhere or some kind of serious short, the problem is I have no idea where to start beside tracing the wires looking for some kind melted blob of plastic and coper. Any help getting me started would be greatly appreciated. I have this vision of standing by my truck all the lights flashing and a pile of wires on the ground, not good.