Replying to Speaker problem in car

I was wondering if anyone has any ideas about what possibly could have happened in my car,

The wires from my deck are spliced together with the wires that puts them to the speaker with electrical tape which i know is not the best thing to hold them together at all

So this distorted sound would occasionally come out of the back left speaker and if i shook the deck it went away so i figured it had something to do with one of the wires back there messing up, i wasn't all that worried about fixing it right away tho cause a little shake of the deck and it went away

However as i was driving home today the noise started being constant from that back speaker so i figured that the wire must have come undone or something

I popped out my deck and sure enough the two wires were completely apart so i re connected them and made sure it was a really good connection

I put my deck back in expecting the problem to be solved but was surprised to hear there was no sound coming from any of my speakers, just the sub pounding away

Does anyone have any idea what could have happened? Literally all i did was pop the deck out and reconnect the wires that had come apart but now none of my speakers work