20 Most Recent Garmin 340c Fish Finder Dual Frequency Saltwater Questions & Answers

Hi, my name is adam and i would love to graciously help you. In your description you stated you need a wiring kit. I have a link included from ebay and you can go on there and hopefully find what you need. http://shop.ebay.com/items/?_nkw=A65+Raymarine+&_sacat=0&_fromfsb=&_trksid=m270.l1313&_odkw=A65+Raymarine+fish+finder+wiring&_osacat=0

your local marina should be able to tell you and they most likely are a dealer for seadog or diversified which will sell your parts just give them your model or just take the unit in with you

You can download them for free at these sites if it helps you.

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http://www8.garmin.com/support/userManual.jsp?market=2&subcategory=31&product=010-00505-00

Garmin GPSMap 420s
http://www8.garmin.com/support/userManual.jsp?market=2&subcategory=30&product=010-00516-22

Garmin GPSMap
http://www8.garmin.com/support/userManual.jsp?market=2&subcategory=30&product=010-00516-42

All transducers should read 0 ohms or close to it. If not you most likely have a broken pin in the connector or wire.

I can't remember correct setup but make sure that box is powered and connected to GPS in right input. With no power to box it won't be discovered by head unit.

Place your ear against the transducer with unit ON. You should hear it 'tikking' ( tic tic tic ) then the transducer is ok...

garmin_products_out_of_support_list_20140207 Here is a pdf for Garmin. you should be able to contact them though email. Good luck

https://www.garmin.com/en-US

Check you transducer cable route and connections. Look for kinks, punctures, & tears in cable. Visually check the transducer for damage. #2 check the units operation on a friends boat with the same set or research a local marine repair shop to check ops. Best of luck on the problem.