William G. Andersen wrote:
Thanks.
We tried that, only the radar/only the radio= no NMEA to either.
(There are separate wires to the radio and the Furuno cable for the
radio: they are both connected to the same DB9.)

"Wout B" wrote in message
...

"William G. Andersen" wrote in message
news:1ni5e.55$lz2.38@fed1read07...
What would you check in this situation?
I have a handheld GPS mounted on my instrument panel; the Garmin
NMEA cable molded fitting is connected to the GPS. The other end of
the wire has a DB9 connector, because it's intended for connection
to a computer. To a mating
DB9 connector, I have the bare end of my Furuno radar NMEA cable
and a pair of wires to deliver NMEA to my radio. This has not been
changed for many months - the GPS provides NMEA data to both radar
and radio. I occasionally connect a different GPS to the radio and
radar by connecting a Garmin NMEA
cable with DB9 connector to the DB9 connector of the radio and
radar. The last couple of times out, there hasn't been any NMEA
indication on the
radar or radio, regardless of which GPS and GPS cable I connected
to the radio/radar DB9.
Today we checked and found continuity in the radio/radar cable and
also in
the GPS cable - they both read OK.
The DB9 connectors on the GPS cables are molded and I use
dielectric grease on them (only the 2 and 5 pins are used).
We opened the DB9 connector that feeds both the radar and radio and
couldn't find a short.
We put it back together and thought we'd try again in a few days.
I verified the obvious like the GPSs are set to NMEA, turned on,
and had located our position and that the radar and radio were
turned on and set to receive NMEA. I've decided to replace the DB9
connector on the cable to the radio.radar even though we didn't see
anything wrong because that's the cheapest thing to replace and I
don't know what else it could be.
What would you check?


If one of the input ports of radio or radar is faulty or shorted
out, you may lose the signal to both.
Disconnect the radio, check if you now get a signal in the radar.
Then disconnect the radar and check the radio.
If still no luck, if you can get access to a laptop with serial port,
check
with Hyperterminal (4800bps, no parity, no flow control).
Cheers,
Wout

It would seem that the fault lies with the GPS, either in the moulded plug
or within the body of the GPS. Have you any means of checking the baud rate?
Connect it to a laptop as suggested and use Hyperterminal to check for data
flow.



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