Voltmeter

Installing the voltmeter in place of the clock is a breeze. The clock is wired to the purple wire and black wire. Black is always ground. Purple is fused direct from the battery. I replaced the end connectors with new ones and just plugged it in. The light bulb is connected to the old light buld wire and to ground.

Wiring the voltmeter this way bypasses the ignition which means that the voltmeter is always "on". This could cause a slight draw on the battery over a long period of time, but I always shut off the battery using the battery disconnect switch so this won't be an issue in my car.