12volt drain coming from Tachometer

[chris380sl]

I've discovered a paradisiac draw of a whopping 12.6 volts. Pulled the fuse that feeds the tail lights, interior lights, warning modular, antenna. After diconecting all the easiest items I removed the dashboard gage cluster. When I pulled the plug out of the tachometer the paradisiac draw dropped to 1.67 volts. Where do I go next

[Diseasel300]

Parasitic drain is not measured in volts, it is measured in amps. If you were indeed measuring voltage, you were measuring the consumption of the clock which would read battery voltage (12.6V or so).

You should measure in amps (milliamps more exactly) with your meter in series with one of the battery leads. Acceptable parasitic draw is <100mA, these old cars should usually be <50mA.

[BWhitmore]

Voltage is a measure of electrical pressure. Amperage is a measure of the amount of current flowing. OHMS is a measure of electrical resistance.