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- Apr 30, 2015
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Your ground block is on your fuse panel...upper left in the picture
Can't say for sure what they do but its clearly connecting 3 cables together with blacks tied to blacks and reds and a white together.Well if it is NMEA the colors are wrong assuming factory cables were used. I am still not sure what it is.
Could be, we just can't tell for sure without understanding what those cables connect to.Can't say for sure what they do but its clearly connecting 3 cables together with blacks tied to blacks and reds and a white together.
Could they be power to something?..yes. Maybe they extended NMEA cables with reb/black pairs.
I think it's best to not connect at first. I don't know if the transducer signal wires are balanced or unbalanced circuit. If unbalanced, connecting the shield (drain) to the ground could make interference worse. I really think the drain is not critical in this installation.Just hook the rf drain to the ground connection. This boat doesn't have a direct rf drain (bolt in hull to ground).
to clarify, VHF radios don't need an RF ground. An RF ground is basically a connection to the sea("ground") thru some copper bonding that is isolated from the DC negative(which we often call "ground").99% of us use the ground bus for that. Unless you have an HF/ SSB radio....