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1. An ohmmeter check conductivity between contacts of the socket of the engine. In the situation OFF conductivity should be between contacts 1 and 4, in the situation LOW – between contacts 1 and 3, and in the situation HIGH – between contacts 2 and 3. |
2. If conductivity is absent, replace the engine. |
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3. Check frequency of rotation of the engine when giving by additional wires of tension of the storage battery on contacts of the socket of the engine. Connect the negative plug of the storage battery to contact 3 sockets. At connection of the positive plug of the storage battery to contact 1 engine should rotate with low frequency of rotation, and at connection to contact the 2nd engine should rotate with high frequency of rotation. |
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