[BlueRooster]

So at -0- all is balanced. So it should always be at 0 or +, because a negative would mean the battery is putting out more pressure than the alternator? Which would indicate a bad alternator or grounding problem?

My multimeter reads about 13.4 to 13.9 and I have an optima red which is about 2 and a half years old. I think the battery has life left in it still. Its the gauge that confuses me.

Every now and again the fuel pump will click and get quiet. The gauge does a hard flicker back to 0 or below then the pump will slowly get noisier and as it does this the gauge goes back to normal. This cycle always happens...always did from day one. I stopped being concerned about it years ago, I just want to understand whats happening.