- This voltmeter gauge is for 1968-74 Chevy II/Nova and. DO NOT CONNECT THIS VOLTMETER TO YOUR STOCK AMMETER WIRING! Since the voltmeter and ammeter connect differently, doing so causes all the electric current used by the car to pass through the. Voltmeter Wiring Diagram 12V (Switched) Ground Ground + --Battery. Created Date: 6/22/2016 1.. The wiring will need to be series and not parallel as a volt meter is wired, in the diagram posted earlier. The AMP gauge sits in the middle of the electrical system, monitors all loads, lights, starter .. whatever when activated. Light 15 amps starter 30 amps, and so one.
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Refer to the Wiring Manuals in the 73-87(91) GM Pickup Manuals thread located in the General Information and Maintenance section of the Technical Forum for model-specific wiring schematics to aid. The ammeter and voltmeter each require two electrical connections to function properly. The ammeter requires two battery connections, separately.. WIRING DIAGRAMS All diagrams contained in this manual are based on the latest product information available at the time of publication approval.. When using a ammeter or voltmeter, and the value being tested is unknown always use the highest scale first and work downward to a midscale reading whenever possible. This will