Old transducer on new HDR650 depthfinder - SailNet Community
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post #1 of 2 Old 08-03-2012 Thread Starter
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Old transducer on new HDR650 depthfinder

I recently bought a new Humminbird HDR650 to replace my working "President" depthfinder which had a display that was too cloudy to read.

I assumed that I'd just hook up the HDR650 to the exisiting transducer wiring but ran into this snag.

The transducer cable has a multiple pin plug that only uses three male pins. The corresponding female has (apparently) multiple wires that are not used.

My old unit has a black, blue and un-insulated braided ground. I assumed that, when I removed female connector from the short pigtail at the unit, I'd find corresponding wires to splce to the three going to my thru-hull transducer.

No such luck! Although there is an un-insulated stranded wire which I assume is ground, there is a blue but no black.

Has anyone ran into this? Does anyone know what the other two wire colors are that go from the plug male pins to the transducer?


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post #2 of 2 Old 08-06-2012 Thread Starter
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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

HDR650 (DF)
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.

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depthfinder , hdr650 , humminbird , transducer

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