Trolling motor interference.

I have a 999ci hd si combo. The transducer is TM mounted.Took it out for the first time today. Every time I turnon the TM the color changes on the screen. I noticed it only did that in SI mode.
I tried adjusting the sensitivity and contrast but no joy. Any suggestions on what to do?
Thanks Fin

Read this ...
http://www.humminbird.com/Category/S...-Interference/

Then call HB ... They deal with interference every day with customers ...
1-800-633-1468
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There is also a lot of info in this thread ...
http://www.crappie.com/crappie/fishi...-interference/

Rickie

I have a 24v and had it connected to the trolling motor battery instead of the starting battery. That may have been it.

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Originally Posted by FIN

I have a 24v and had it connected to the trolling motor battery instead of the starting battery. That may have been it.

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Very likely

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Originally Posted by CatFan

Very likely

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Didn't work. My boat has a 24v system. The starter battery is connected to the TM battery to make 24v. Will I have to have a 3rd battery for the Humminbird?

My TM power has a Electro Guard. Does that matter?

Electro Guard 2 1/4 Inch Zinc Boat Propellar Shaft Anode | Great Lakes Skipper

Quote:

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Originally Posted by FIN

Didn't work. My boat has a 24v system. The starter battery is connected to the TM battery to make 24v. Will I have to have a 3rd battery for the Humminbird?

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You can test this by temporarily installing a separate battery for the electronics ...

Rickie

I bought a Schumacher 1000 Peak Amp Instant Portable Power Source. It has a 12v outlet. Ill try it.

Independent battery fixed it.