Use a charged battery to test.
Disconnect ground cable (-) from the battery.
Attention: This will erase the entries in the memory of the on-board computer. In particular, fault records and radio code. Before disconnecting the battery, read the contents of the section «Removing and installing the battery».
Set the ammeter to the largest measurement range (measuring range from 0.5 ta to 5A). Connect an ammeter between the negative pole of the battery and the negative wire. Attention: The check can also be made with a test lamp. If at the same time the lamp does not light up, then you still need to use an ammeter.
Disable all consumers. Disable clock (are regular customers). Close doors.
Switching from a higher measurement range to a lower one, achieve a reading on the ammeter scale (it can be 1-3 mA).
Consistently removing the fuses to break the electrical circuits. If on one of the circuits the ammeter reading becomes zero, then this is a sign of a malfunction in this circuit. Malfunctions can be: rust and dirt on the contacts, chafing of wires, internal short circuit in an electrical appliance or unit.
If no fault is found in the fused circuit, the unfused circuits must be checked by opening them. Such circuits are: the ignition circuit, in some cars, the generator and starter.
If during the test the ammeter shows zero, then it is necessary to repair or replace the corresponding element. If there is a current leakage in the starter or ignition circuit, be sure to check the ignition switch.
Connect ground wire (-) with rechargeable battery.
Set the time on the clock, if any, and enter the code into the radio.