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I bought a fish finder and I am looking for a place to mount it. I have a 2003 243 Sunesta. I have already ran my transducer wire. Also I want to splice into the OEM depth finder switch, but I am not sure what wires to splice into.
Do you have any recommendations to place the finder and what wires I splice for the power source.
I really don't know the layout of a 243. But I would mount it as high enough so that your not taking your eyes off the road/water that much. In other words, you don't won't to be looking down than up. But glancing up and down!!
I am not sure what you mean by "Also I want to splice into the OEM depth finder switch, but I am not sure what wires to splice into." But, don't touch the stock transducer wires. Its good to have two sources for depth.
As to power, I would look into the future. Meaning you may want to run up a 10 guage wire from the battery switch and the battery's ground. For ground, you can install a bus bar. For the Pos side install a 6 circuit fuse panel. Both can be installed under the helm. Now if needed you can add a VHF, GPS, lights and more.