| 1. Disconnect the socket from the aerial. |
| 2. Check, whether tension of the storage battery on contacts 1 and 3 sockets moves constantly. |
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3. Check, whether tension of the storage battery on contacts 1 and 2 sockets moves at ignition and radio receiver inclusion. |
| 4. Additional wires submit tension of the storage battery on contacts 3 and 2 and check, whether the aerial engine (the aerial should be put forward) works. |
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5. Check, whether the aerial engine after a detachment of contact 2 from the battery (the aerial should move down) works. |