While I dislike the NWT, you're right: it's the bible whose wording he will be familiar with. Outside of several verses that the WT "tampered with*" to conform with their doctrines, it is usually adequate.
The trouble I see is that the 17 years of non-communication has become habitual. He probably doesn't see you as family any more and feels no obligation towards your father or anyone else. Remember, "worldly" people (anyone not a JW) are condemned already. You could try using some biblical reasoning to reach out to him, but in his eyes you have no authority to be interpreting the Bible; that right belongs exclusively to the Governing Body in JW doctrine and practice.
So yes, try and reach out. Perhaps you will be pleasantly surprised. Or perhaps not. Be prepared, either way.
* This is the opinion of some, and is not meant to stir up that debate in this thread. There are plenty of other threads along those lines. The important thing is to address the OP's request for help reaching out to estranged JW family.