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Next: SSB to shore?
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External
Since: Feb 10, 2004
Posts: 90
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(Msg. 1) Posted: Thu Apr 07, 2005 3:20 pm
Post subject: wiring short/break
Archived from groups: rec>boats>electronics (more info?)
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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? |
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External
Since: Feb 25, 2005
Posts: 11
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(Msg. 2) Posted: Fri Apr 08, 2005 12:18 pm
Post subject: Re: wiring short/break [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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"William G. Andersen" <wgander DeleteThis @cox.net> 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 |
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External
Since: Feb 10, 2004
Posts: 90
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(Msg. 3) Posted: Fri Apr 08, 2005 12:18 pm
Post subject: Re: wiring short/break [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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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" <woutbeekhuizen RemoveThis @hotmail.com> wrote in message
news:d34j1v$t0t$1@lust.ihug.co.nz...
>
> "William G. Andersen" <wgander RemoveThis @cox.net> wrote in message
> news:1ni5e.55$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
>
> >> Stay informed about: wiring short/break |
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External
Since: May 11, 2004
Posts: 18
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(Msg. 4) Posted: Fri Apr 08, 2005 12:18 pm
Post subject: Re: wiring short/break [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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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" <woutbeekhuizen.DeleteThis@hotmail.com> wrote in message
> news:d34j1v$t0t$1@lust.ihug.co.nz...
>>
>> "William G. Andersen" <wgander.DeleteThis@cox.net> wrote in message
>> news:1ni5e.55$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.
Digital Photo-charts for all UK areas.
Remove 'nospam' to reply. >> Stay informed about: wiring short/break |
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External
Since: Feb 02, 2005
Posts: 1823
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(Msg. 5) Posted: Sat Apr 09, 2005 11:52 am
Post subject: Re: wiring short/break [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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On Thu, 7 Apr 2005 15:20:46 -0700, "William G. Andersen"
<wgander.RemoveThis@cox.net> wrote:
>What would you check in this situation?
===================================
Check the "setup" options on your GPS to ensure that the data out
function or settings have not been inadvertantly changed. >> Stay informed about: wiring short/break |
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External
Since: Feb 10, 2004
Posts: 90
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(Msg. 6) Posted: Wed Apr 13, 2005 9:20 am
Post subject: Re: wiring short/break [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Here's my follow up, for the benefit of those of you who, like me try to
learn something from this newsgroup.
I had suspected corrosion in the DB9 connector on the end of the Furuno
radar cable, where the wires to the radio are also connected, because , even
though we checked for continuity, we thought the NMEA signal isn't strong,
and may not be getting through.
I decided to try, one more time, as long as we had the boat out last night.
I verified the GPS was set for NMEA/NMEA and lowered the BAUD rate to 4800.
Bingo!
NMEA data displayed on radar and VHF-FM radio.
I never paid any attention to the BAUD rate before. I will from now on,
because it's evident that the radio and radar don't listen to higher speeds.
How nice to have course and speed displayed on the radar again - where
almost anyone in the boat can see it. The GPS is a handheld, mounted for the
helmsman and difficult for others to read.
"Wayne.B" <waynebatrecdotboats RemoveThis @hotmail.com> wrote in message
news:ffuf515e8vtpv0asudm5q53io9080e1moq@4ax.com...
> On Thu, 7 Apr 2005 15:20:46 -0700, "William G. Andersen"
> <wgander RemoveThis @cox.net> wrote:
>
>>What would you check in this situation?
>
> ===================================
>
> Check the "setup" options on your GPS to ensure that the data out
> function or settings have not been inadvertantly changed.
> >> Stay informed about: wiring short/break |
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External
Since: May 11, 2004
Posts: 18
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(Msg. 7) Posted: Fri Apr 15, 2005 1:22 pm
Post subject: Re: wiring short/break [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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William G. Andersen wrote:
> Here's my follow up, for the benefit of those of you who, like me try
> to learn something from this newsgroup.
> I had suspected corrosion in the DB9 connector on the end of the
> Furuno radar cable, where the wires to the radio are also connected,
> because , even though we checked for continuity, we thought the NMEA
> signal isn't strong, and may not be getting through.
> I decided to try, one more time, as long as we had the boat out last
> night. I verified the GPS was set for NMEA/NMEA and lowered the BAUD
> rate to 4800. Bingo!
> NMEA data displayed on radar and VHF-FM radio.
> I never paid any attention to the BAUD rate before. I will from now
> on, because it's evident that the radio and radar don't listen to
> higher speeds. How nice to have course and speed displayed on the
> radar again - where almost anyone in the boat can see it. The GPS is
> a handheld, mounted for the helmsman and difficult for others to read.
>
>
> "Wayne.B" <waynebatrecdotboats.DeleteThis@hotmail.com> wrote in message
> news:ffuf515e8vtpv0asudm5q53io9080e1moq@4ax.com...
>> On Thu, 7 Apr 2005 15:20:46 -0700, "William G. Andersen"
>> <wgander.DeleteThis@cox.net> wrote:
>>
>>> What would you check in this situation?
>>
>> ===================================
>>
>> Check the "setup" options on your GPS to ensure that the data out
>> function or settings have not been inadvertantly changed.
I had a similar problem with an Oziexplorer installation a couple of years
ago. It simply would not communicate on NMEA settings. The boat owner had
taken out his yacht and had changed the comms configuration in Ozi to
115,200, as he "wanted the boat to appear to go faster!". As soon as I
adjusted the baud rate back to 4800, the sentences started to flow.
Problem is, I deal with sailors to whom a laptop is "hyper-technology", and
they are trying to master the usage of same at an age when most other guys
(including myself) have retired.
--
Digital Photo-charts fo all UK areas.
Remove 'nospam' to reply. >> Stay informed about: wiring short/break |
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