I have a 98 GST Spyder..for some reason when the car is on there is this prominent buzzing sound that's coming from the back of the car on the driver..Could it be a fuel pump, I have no clue any ideas. WHich leads me to my next deilemma....the lights in my gauges have a slight dimming that coincides withthe buzzing. The buzzing is not really noticeable when driving but when the car is just idling it's noticeable. Any ideas? Any relations between the buzzing and the lights wavering?