UAZ starter works, engine does not turn over

The reason when the starter does not turn the engine on a UAZ

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It sat down warmly, after two successful attempts, when turning the key to the extreme position, a single click is heard, the starter does not turn. Changed add. relay, inspected the external contacts on the retractor. The wiring seems to be intact, it starts with a screwdriver. . Once it starts with a screwdriver, you need to check the condition of the battery and the thick wires to the starter. The battery may simply be discharged (it was left in the winter), and the terminals on the wires have oxidized (for the same reason). In principle, one of these reasons is sufficient for the appearance of such an effect, but what if both are present. [quote=”tema”]Didn’t you listen to what was clicking? Additional relay, or retractor too?

In the additional area it is quiet, the retractor clicks. The battery is good, about 2-3 weeks before the event it was charged and serviced. What is a nickel?