Laser FWD L4-1997cc 2.0L DOHC Turbo (1993)
Ammeter Gauge: Description and Operation
Ammeter (Variable Voltage Type) Operation
Fig. 1 Conventional Type Ammeter (typical)
The ammeter is used to indicate current flow into and out of the battery. When electrical accessories in the vehicle draw more current than the
alternator can supply, current flows from the battery and the ammeter indicates a discharge (-) condition. When electrical loads of the vehicle are less
than alternator output, current is available to charge the battery, and the ammeter indicates a charge (+) condition. If battery is fully charged, the voltage
regulator reduces alternator output to meet only immediate vehicle electrical loads, and the ammeter reads zero.
A conventional ammeter is connected between the battery and alternator in order to indicate current flow. This type ammeter consists of a frame to
which a permanent magnet is attached. The frame also supports an armature and pointer assembly. Current in this system flows from the alternator
through the ammeter, then to the battery or from the battery through the ammeter into the vehicle electrical system, depending on vehicle operating
conditions.
When current flow is not present through the ammeter, the magnet holds the pointer armature so the pointer stands centered in the dial. When current
passes in either direction through the ammeter, the resulting magnetic field attracts the armature away from the effect of the permanent magnet, giving a
reading proportional to the strength of the current flowing.
