Yesterday I took the binacle out to clean up the former owners idea of aftermarket stereo installation ( a taped bundle of wires almost as big around as my wrist) and found a small hard plastic vacuum tube running under the binacle that had been melted in half at some point when a wire had shorted and burnt. Could someone please tell me the function of this tube and what kind of vacuum related problem fixing this will clear up. Thanks Phil Priestley vin 2105