![]() ![]() When using a generator with external voltage regulator you could connect the volt meter at the point where the dynamo output wire connects to the control box. You could otherwise connect the volt meter closer to the main battery cable for a lttle better reading of actual battery charging or discharging condition. When you crank the engine for starting expect the battery voltage to drop noticeably lower (hopefully not below 10 volts). When you blow the horn it will dip just slightly lower. When correct it read near mid scale, hopefully a bit above 12 volts with engine running. ![]() ![]() If you get it wrong the meter will peg on zero with power on. It is convient to connect it to the output side of the ignition switch.Ĭonnect the volt meter + and - terminals to battery + and - respectively. It is a good idea to connect the signal side of the volt meter to a circuit which is switched by the ignition switch, so it will be disconnected from the battery when the car is parked. In practice you can connect the earth side of the volt meter to any convenient chassis ground point. The volt meter is a high resistance low current device which can be connected directly across the battery. So to have the best meter reading you would want a dash mounted volt meter with dial range of 8 to 16 volts (give or take a bit), not a 0 to 20 volt meter. The car battery tends to dampen system voltage swings, generally well within a range of 8 to 16 volts (for a nominal 12 volt system). It used to be common to install an amp meter in an MGA (back in the day), but unless you are in search of some unusual information you may be better served with a volt meter.Ī dash mounted volt meter will be used to monitor electrical system voltage as you drive. In-car Volt meter The MGA With An Attitudeīeware first that Volt and Amp meters are substantially different critters to be used for different purposes. ![]()
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