The po of my truck was a wiring hack and put about 20 lights on my truck for no reason, hacking up the harness, I got rid of a lot and took out miles of useless wires, and all was good for a while, but know I'm having problems and because of the po's incompetents it's almost impossible to trace, my low beams don't work, right turn signal, brake lights on the back rack don't work when either running lights or headlights are on, but when no lights are on they act as running lights, and my reverse lights sometimes work, sometimes don't work, and sometimes flash with my turn signal. So where can I start to rewrite every signal light on my truck?