Fish Finder installation

jjohnso

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I just recently purchased a 21SFXAPG and it did not have a fish finder installed.
Purchased a Garmin 73SV over the weekend and would like to install it myself since the dealers are so backed up currently.

Was hoping I could wire the power under the dash but curious what others have done. Is there a way to add it to one of the switches or would I be best to run it to the battery in the back of the boat?

Any guidance appreciated as I am a first time boat owner

Thanks in advance
JJ
 
There shouldn’t be a problem tapping into one of the circuits under the helm. Usually the depth finder and radio are on a circuit off of the accessory switch. Should be pretty straightforward.
 
My accessory switch was factory wired powering the fish finder and the radio.
 
There shouldn’t be a problem tapping into one of the circuits under the helm. Usually the depth finder and radio are on a circuit off of the accessory switch. Should be pretty straightforward.
Thanks for the reply. I went out last night and saw an open place to tap into.
 
It can be a little intimidating lying on your back under the helm looking up at all that wiring. Don't remember where I got this, but this drawing really makes it easy to understand typical boat wiring.

boat wiring.jpg
 
I'm planning to install a fish finder as well. I used a multimeter and found an extra unused plug hanging that would become hot when I turned on the accessory switch for my radio. Probably what the dealer would use. 20200609_095356.jpg
 
It can be a little intimidating lying on your back under the helm looking up at all that wiring. Don't remember where I got this, but this drawing really makes it easy to understand typical boat wiring.

View attachment 27018
[/QUOTE
It can be a little intimidating lying on your back under the helm looking up at all that wiring. Don't remember where I got this, but this drawing really makes it easy to understand typical boat wiring.

View attachment 27018
Nice! Thanks for sharing
 
What did you use to drill the hole in the console for the fish finder cables? Should I use a paddle bit or just a large drill bit?
 
I'm planning to install a fish finder as well. I used a multimeter and found an extra unused plug hanging that would become hot when I turned on the accessory switch for my radio. Probably what the dealer would use. View attachment 27021


I found this (actually 2) plugs under my helm also. Where did you find the mating plug?
TT
 
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