My stock voltage guage in the dash seems to read low when running. It normally points about 3 minor ticks below the 14 (which would be around 12.1V) with the highest reading at one minor tick below 14 V (which would be around 13.4V). Does yours read the same?

I've measured voltage at the battery's and at the alternator output when running and it reads just above 14V. Why the difference between here and the guage?

Is there a ground connection the dash gauges use that I could ensure was clean? Where can I find this at?

Thanks...