i was installing a relay for my car the other nite and when hookin up a connection to the constant 12 for the stereo there was a spark and i was shocked caus i had hooked up to the parklight wire instead oopps(the constant 1 and park light) so now my HU isnt turning on and there is no power in the wire so what happen and what should i do also sum of my interior lights arent workin like the tempature stuff and cig light and the dash gauge(the 2 bulbs in the instrument cluster arent on and the fuse isnt blown)and help would b apperciated