Is there any way to calibrate the car's voltmeter?
I have a 95 Cadi DeVille; it's voltmeter reads 13.5 when my multimeters measure 14.7. I
know it is just an anal question, but I just wanted to know does anyone know how I can
calibrate it to read the correct reading? I mod the cluster to read as a Seville model
because DeVille models don't normally provide voltmeters. Even if it means creating a
small calibrating device to simply give the correct reading.