I own a seat Leon mk2 1.6 and the other day I saw my earthing wire on my sub had come loose. When I went to move it it sparked and my electrics all went down. My stereo won't turn on and neither will my sub which is directly wired to my battery. Also my center door locks isn't illuminated and won't lock or unlock my car. The windows won't auto up or down and my key fob doesn't work either. The car starts and runs fine. The dash also tells me a door is always open when they aren't. I've tried replacing all fuses in the engine bay and near the steering wheel but still nothing, anyone know what's happening?