Use a charged battery for testing.
Set the ammeter to the highest measurement limit.
With the ignition off, disconnect the ground wire from the battery (-).
Attention: Follow the instructions given in chapter «Removing and installing the battery».
Connect an ammeter between the negative pole of the battery (-) and earth wire (-). In this case, the positive pole of the ammeter (+) must be connected to ground wire (-), and the negative pole (-) - with negative pole (-) battery.
Attention: The test can also be carried out using a test lamp. If the lamp connected between the ground wire and the negative pole of the battery does not light up, then in this case it is necessary to use an ammeter.
Turn off all consumers of electricity, available hours (and other regular customers) off, close doors.
Reduce the measuring range of the ammeter until you can read the reading from the scale of the device (allowable value - 1-3 ta).
By taking out the fuses in series, breaking various electrical circuits. If, with an open circuit, the ammeter needle deviates to zero, then the malfunction should be sought in this particular circuit.
A malfunction can be caused by corrosion and contamination of contacts, chafing of wires, or a short circuit inside the unit.
If no fault is found in the fused electrical circuit, the wires must be disconnected from the unfused unit. Such a unit can be a generator, a starter.
If, when the unit is turned off, the ammeter needle deviates to zero, then the corresponding unit must be repaired or replaced. In the event of power loss in the starter or ignition system, always check the starter and ignition switch according to the wiring diagram.
With the ignition off, connect the ground wire (-) to the battery.
Attention: Follow the instructions given in chapter «Removing and installing the battery».
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