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Re: Old transducer on new HDR650 depthfinder
Pin outs for existing transducer to Humminbird HDR650.
Through a bit of trial and error, coupled with looking at the cut harness connector, I came up with the following that got the Depthfinder working:
Old Transducer (TD)
Black, Blue, Bare
White, Orange, Green, Blue, Yellow Red, Bare
Connection that works: DF White to TD Blue, DF Orange to TD Black, Bare to Bare
Note that the DF wires are so fine that it is best to strip back both sets of wires carefully and use a wrap splice and solder. The typical 18/22G red butt crimp-on splice doesn't work well with wires this small.
You should be able to use the DF Orange, White and Bare to hook up to any existing transducer.