In-dash depth finder wiring diagram

[sjayjock]

I have an in-dash depth finder on my boat. I am unsure of the brand, as I bought the boat used. The mainline from the exterior unit is installed, but i have a small cluster of wires exiting the unit un-installed. I would like to wire up the unit to see if it still works before buying another one.

Does anyone have a wiring diagram from an in-dash unit that I could use as a reference that may help me figure out the wiring and where they should go. Thank you.

 

[HAV2FISH]

Re: In-dash depth finder wiring diagram

Look up Humminbird.com you might get lucky and find the unit you have. They also have instillation diagrams you can download.

 

[Silvertip]

Re: In-dash depth finder wiring diagram

You should have three to four connections. 1) transducer (either thru-hull or stern mounted). 2) +12 volts when the key is on should connect to the "I" (ignition) or "+" terminal on the gauge. 3) Ground is the "-" connection on the gauge. 4) If the gauge is lit, it will have another terminal probably designated "L" and it will normally be connectd to either the NAV/ANC switch or if your instrument lights are on any time the key is on, it can be connected to +12 volt "I" terminal. The transducer normally has a unique connector on its cable so connecting it should be obvious. Some depth finders have a single connection on the back but the cable connecting the transducer has another cable attached to it that provides the +12 volt and ground connections. Either way, +12 volt and ground are required for operation.