alright few days ago when i went into my car to start it, it shut down, all electronics was off and car would not start or anything, so i flicked the batter wire connected to the positive charge up and down a bit and back and forth and the car started just fine, all electronics working, except for my radio, radio doesnt turn on anymore, iv checked the fuses for just about everything and they are fine, i reset the battery and nothing, it also did this yesterday and i had to wiggle the wires around again, im thinkin i need new wiring but y wouldnt my radio turn on anymore, anyone know what the problem could be?
pic of my radio:
