If you think i'm out of topic of the site just erase this. 
It is not really you out of the topic. It is us that we have run out of topics
Actually we should have a MOTORS topic somewhere. It will be done.
Well, a 3 phase motor has 3 coils. Thus, 3 coils means 6 connections. I think you have met before these 6 pairs of connections. They are called RST from the input side and UVW from the output.
Each coil uses 2 of these pins, so coil 1 has R and U, coil 2 has S and V and coil 3 has T and W.
1] To check first that there is no circuit break, you must measure the resistants to the coils and you must find approximately the same resistant. For example you must find 4 Ohms between R-U and S-V and T-W.
2] Then, to ensure that there is no sort-circuit, you must measure the resistant between the inputs of the coils. You must find it
infinate. The measurements are R-S, S-T and R-W. For being sure you can also measure the outputs (U-V,V-W,U-W).
3] To ensure that there is no current leak, you must now measure the inputs of the coils to the ground. This must also be infinate. (R-N,S-N,T-N and you can also measure U-N,V-N,W-N).
If all other above are correct, then your motor should work.
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