So today I spliced into the Power/Data cable to my chartplotter and lost
Seatalk!! Per the attached schematic, I cut the orange and yellow wires in the cable and butt-spliced them. On one side of each butt splice I added a pigtail that ran to the serial cable going to my PC, again per the attached schematic that Raymarine provided me. I figured one butt splice per wire would provide a better signal than a couple of ring connectors and a bus bar, so I went that route
Now I have lost Seatalk
between the radar
and chartplotter! Both (still) work independently, but don't talk to each other. And to make matters worse, I'm not able to get any data to my PC.
We measure a -.17V out of the NMEA
OUT cable. This has me thinking things are hooked up backwards. One is blue with white specks, which I took to be 'blue' and the other is white with blue specks, which I took to be 'white'. So maybe I need to reverse these wires, yes?
But the bigger problem may be with the NMEA
IN coming from the Power/Data cable. I fear that because I broke into the cable, peeled back the thick, wire mesh RF shielding, and made some good butt splices on the yellow and orange wires that this has caused me to lose Seatalk
. Can you confirm that or not?
I was thinking of wrapping the splices with tin foil before taping them up. But I would like to know they are working properly first. Any ideas on how to confirm that would also be helpful.
I'll stop here and answer any troubleshooting questions you may have. Thanks a lot for your help.