Question about Garmin Gpsmap 498, External Antenna With Dual Frequency Transom Mount Transducer

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I have Garmin GPSmap 498 and the wiring inside the case has broken due to the RF filter bouncing around. The power, both positive and negative and the depth finder wires have all broken off at the connector on the rear of the case and I can't tell which wire goes where since the broke off right at the solder points on the pins. All other wires are still attached. How can I find out which of these four wires (+,-, depth finder) goes where?

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Posted on Jan 02, 2017

  • 18 Answers

SOURCE: Where do all the wiring go to on the garmin 400c

The rest of the wires are for interfacing (letting the unit 'talk') with other devices such as radar or GPS. These wires/colors are pretty standard and defined by NEMA (National Electrical Manufacturers Association). You need wiring diagrams for the devices to hook them up. For fun, see where 'nema' takes you with Google.

Posted on Jun 18, 2009

budgie140
  • 501 Answers

SOURCE: Is Garmin Fishfinder 90 working?

possibly.most ive owned will flash random numbers when out of the water.the fact its flashing or reading numbers at all,means its working.youll have put it in water to see how accurate,obviously

Posted on Jul 08, 2010

  • 5 Answers

SOURCE: I have a GPS Map 498-depth sounder not working? Ha...

If the transducer is out of the water, you will not get a reading and see the flashing depth. You should hear and feel the clicking in the transducer when out of the water and working properly. Are you getting a temp reading when out of the water?

Posted on Jul 31, 2010

rickbrashear
  • 176 Answers

SOURCE: Connections problem

Question: What are the extra wires used for on the power cable for my fishfinder?
I found this on the carmin website under questions and answers. I think your cable is ok to use according to this.
--> Answer: Not all of the wires in the harness are required for use. To connect the unit to the power source, only the black & red wires are required (black to ground, red to positive). Here are descriptions of the other wires in the harness:

  • The Blue wire is used for a NMEA data out connection to another NMEA compatible device. The fish finder outputs NMEA 0183 version 3.01. The receiving device must be compatible with this format and looking for the NEMA sentences DPT, DBT, MTM, or VHW.
  • The Brown wire is used for a NMEA data in connection to receive data from another NMEA compatible device.
  • The Yellow wire is used to connect to an external buzzer or alarm to alert you to any alarms which have been set to sound on the device. The Yellow GARMIN wire connects to the negative end of the external alarm. The positive return on the alarm will connect to the red positive wire of GARMIN.
  • The green, white, and any other colors present have no connection purpose related to your fishfinder. The 18 Pin connector wiring harness is used by several other devices which utilize these wires.
If the device is only being connected to power & do not require a NMEA interface, PC connection, or external alarm support, only the red & black wires are required.

Posted on Jul 05, 2012

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Here's the link to download the manual for free. If this solves your problem, please come back and rate our solution.
https://buy.garmin.com/shop/shop.do?pID=370

Jul 31, 2009 | Garmin Gpsmap 498, External Antenna With...

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Nov 07, 2008 | Garmin GPSMAP 498

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Okay
guys: book says:
PIN 1 (red) 10-40 volts DC
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Depth display


reset your factory settings!

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