"I'm a pretty humble guy - I don't mind admitting when I'm wrong or do something dumb. I have zero doubt that this is a simple issue. But having 3 guys take a look at it (the other two much more experienced boat owners than myself, I'll readily admit) and still not being able to figure it out...I may just have to learn the hard way. I'll take my licks on this one and learn a lesson if I have to."

I wouldn't have that electrician do any work on my house, just FYI. This is a simple 2 wire continuity issue. That is as BASIC as wiring can possibly get - simple wire tracing reveals most issues. Often, by simply noting all the wire colors in the harness at the bow, which ones are connected to the graph power cable, and then looking for those coming into the console from the bow is how this starts. A must connect to B that must connect to C and so forth. An electrician can't do that? A wire headed to the bow that's pulled off the fuse block and dangling is an issue, for instance. Fuse good? Yep, just never mind the wire got pulled loose (while installing an Ethernet cable as an example). This is the type of problem you have. Did the electrician have a voltmeter? Tracing wires, checking voltage, step by step is all that this takes. He doesn't even have to understand boats to do this simple task.

Electricity works like water flowing through a hose. Cut or disconnect the hose at any point and the flow at the end stops. What you're chasing is this simple. But, you have to make sure you are looking at the correct wires. This is where the visual and jiggle tracing come into play. Every time the wire connects to something, it must continue on to the next point. The "cuts" are a blown fuse or a wire no longer connected to whatever it was supposed to be connected to so that it reaches the battery - and this goes for the + and the - (typically a red wire and black wire).

Now is your chance to wire the bow unit right. Simply run a hot wire from your battery (with a fuse in it) up to the bow unit. Do not come out of the fuse box at the console. You'll end up with a power drop and always have problems. You can pull a new wire quicker than you can haul your boat into the dealer.

Yes sir, respectfully sir...we did all of this. There were literally zero loose wires which is why we started checking - with a voltmeter. We even double checked with a test light - spent about an hour on all of this.

I truly feel like there is a fuse somewhere that was missed - which is why I feel it's a simple issue - but we just couldn't figure out where. Every boat I've owned to this point I've been able to do routine, basic maintenance on (occasionally with the help of others). But this boat by far has the most bells and whistles. I can understand the frustration - and humor - when you feel you know the problem without even seeing it. I fully get it. I'm getting it fixed and will learn a valuable lesson from it that I can pass on. I sincerely appreciate your response...I know you are just trying to help sir.

Surely there is someone that is familiar with this issue...

I recently purchased a boat with Lowrance HDS Carbon 9's at the bow and console. They were not linked, so I installed the ethernet cable myself...however now the bow unit will not power on. Any ideas on what the issue may be?

The cable is the common denominator, if both units worked before,..maybe the cable is bad.