with sun they all come back on? 2004 trailblazer, started a few months ago when it rains or moisture is in the air, my speakers go to a extremely low sound..after a few sunny days everything starts working again radonmly..sometimes 1 or 2 speakers and a few min or hours later a few more??help with any in-expensive remedy..someone said wiring harness is a huge mess of wires, and if the problemis there ill never find it, i tried replacin the radio..to no help???anyone??even a suggestion ..i am not literate to audio at all...