SeaTalkNG power issue. Please help! Raymarine P70s and i70s not turning on.

[Cool Hand Luke]

Hello fellow Cruisers!! I have a 2011 Jeanneau SO409. Recently the Raymarine P70s and i70s stopped working. I thought they just crapped out. But I bought a new i70s and plugged it in and it also doesn’t work. I’m thinking it’s a power issue. Where would the SeaTalkNG network get the 12V power? I can’t seem to locate the cable.

The C90w chart plotter works fine. But I think that’s on its own power source. But the SeaTalkNG network might not be getting power. Anyone know where the power cable would be? Or maybe a blown fuse? Or would it be safe to just attach another power cable in the middle of the network? I tried attaching the newly purchased i70s to multiple different SeaTalkNG ports and it won’t turn on

Any help will be greatly appreciated!!

[Knotical]

Connect it to an open slot on the 5 way connector (4th photo in your post), you will need their power cable, it’s colored red and black.

[Cool Hand Luke]

Originally Posted by Knotical

Connect it to an open slot on the 5 way connector (4th photo in your post), you will need their power cable, it’s colored red and black.

Yep. That’s what I thought. I already bought the power cable (red/black). Should I have a fuse on it? If so, how many amps?

But I had power in the past. The screens were working. Will it be bad if I have potentially 2 power sources in the network?

Thanks for the quick reply!

[Knotical]

Yes, a 5 amp fuse for the instruments.

You are correct that the chart plotter has its own power supply, make sure that’s fused too.

[Kelkara]

some raymarine autopilots actually supply power to the seatslkng network directly without the need for the red/black power cable ... something else to check.

[Seafarer7]

Originally Posted by Kelkara

some raymarine autopilots actually supply power to the seatslkng network directly without the need for the red/black power cable ... something else to check.

If you have a Raymarine autopilot that’s connected to your SeaTalkNG bus it’s likely your source of power. Ensure
the bus fuse in the autopilot (next to the SeaTalk power connection) is ok, and that the “power the bus” switch is on

[GreenWave]

I don't think two power sources is what you want. There are recommended diagrams out there for connecting power with and without an autopilot. Either on Raymarine website or a Google search.


Having said that - if you had power working at one time and now it doesn't then you probably need to sort that out. 99% of the time it is corrosion or cable connections. So trace those, remove, clean and reconnect.

[smac999]

Follow the blue cable. You will fine more blocks like that. One should have a red / black cable that is putting power into the backbone.

[smac999]

Originally Posted by Cool Hand Luke

Yep. That’s what I thought. I already bought the power cable (red/black). Should I have a fuse on it? If so, how many amps?

But I had power in the past. The screens were working. Will it be bad if I have potentially 2 power sources in the network?

Thanks for the quick reply!

No don’t add 2nd power. find the problem. It obviously has power before.

[OldGreyB]

As others have stated, your C series Plotter if working correctly will power the SeaTalkNG® network, so the first test is since that is still active, to ensure this is powering the network. [See C Series Connection.jpg]

To test if the SeaTalkNG® network has power, where one of your (Black / White) spur cable is connected to your 5 way SeaTalkNG® block, measure the voltage on the other non connected end female socket as shown, with a multi meter. You should read your battery / instrumentation breaker voltage. NMEA normally requires 12Vdc with a maximum variation of +/- 1.5 Volts
[See SeaTalkNG Spur Power.jpg]

You may need to use small bare wires twisted onto your multimeter probes and poke them into the female sockets to obtain voltage readings, as a typical multimeter probe is too fat.

If there is no power there, then you will need to trace back - checking the connections at the 5 way block, and then the SeaTalkNG® backbone cables (Black/Blue).

If required, disconnect each connector, spray Electrical Contact cleaner on sockets and plugs. (NOT WD40) and let dry before reconnection. Also any spare sockets such as shown on your 5 way block should have the black SeaTalkNG® blanking plugs installed to reduce corrosion.

[Cool Hand Luke]

Thank you so much, guys! Going to the boat today. I’ll bring my voltmeter. And I’ll check the autopilot.

[Cool Hand Luke]

Thank you to everyone that replied!!!! You guys are the best!! Power was being fed by the autopilot. As per recommendation. Checked the fuses (the 3amp ones). And sure enough. I found the culprit!!! There was a spare 3amp fuse in the plastic cover (how awesome is that) and worked immediately. Thank you!!!









Now if only I can fix the green direction line. But that’s a different topic for a different day. Something to do with the fluxgate compass, I believe. I wonder if I can turn it off and use the GPS that came with my new AIS that I bought