Question about Garmin GPS 126 GPS Receiver

1 Answer

Internal wiring The previous owner of the unit replaced the connectors on the unit and i think he didn't connect the wires correctly. most wiring diagrams  show the wiring for the external cable  which does not correspond with the wires that are connect to the pc board inside the unit. Can anyone tell me which wires to connect to serial port on pc and to which pins?

Posted by on

1 Answer

  • Level 1:

    An expert who has achieved level 1.


    An expert that got 5 achievements.


    An expert whose answer got voted for 20 times.


    An expert who has answered 20 questions.

  • Contributor
  • 59 Answers
Re: internal wiring

Hi - I have a Garmin GPS 126 in bits on my desk ready for a new cable as the socket in the back has some broken pins.

Also refer to the Garmin GPS to PC Wiring Instructions here on the Garmin site:

The internal 8 pin white connector on to the back of the circuit board is as follows:

1 Red Positive
2 Black Negative
3 Yellow Data Out
4 Green Data In
5 not used
6 not used
7 White Alarm

All the best, Tony at KiwiGPS, New Zealand

Posted on Apr 25, 2009

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

1 Answer

Buttons don't work on timex gps watch

I had the same problem and this is how I fixed it: Unscrew all 8 screws and take off the back of the watch. Look for a small square connector that I think connects the square battery to the internals of the watch (its on the far side of the watch and is white).

Use something like needle nose pliers and carefully lift the square connector away from the internals - but only lift it out a mm or two.

Press one of the buttons that doesn't work. For me, all the buttons starting working and I carefully put the watch back together. I think the buttons are no longer aligned inside the watch and they aren't actually touching anything within the watch when you press them.

For me, this process realigned the buttons with the internals and the watch now works. Good Luck!

Dec 08, 2013 | Timex Marathon GPS Watch Blue

1 Answer

Bluetooth volume too low Go730

You are out of luck...I have the same unit and it wont even connect with my LG Voyager! the volume doesn't want to cooperate with anything I think it should do. I actually went with a wired headset to answer call once it did connect and forgot about the whole speaker thing.

Aug 27, 2009 | Tomtom GO 730T Car GPS Receiver

1 Answer

Gps error message "gps module not responding"

Check the connectors and wiring between the GPS module and sonar unit. If it's an internal GPS module yo may have knocked loose a connector internally.

Jun 01, 2009 | Lowrance LCX-17m Sonar with GPS GPS...

1 Answer

Wrks as expected, external power us, but intermittently turns off

The connectors are obvious, careful when youopen it up as the wires aren't very long! Look at the internal battery - it may be corroded looking - which is a sure sign it's gone west. Lots of info online on replacing it, you can try carefully snipping one of the battery leads and see if the sympton changes. Good luck

Mar 13, 2009 | Garmin GPS III

4 Answers

Malfunctioning Garmin GTM 20 fused GPS power adapter

The two red wires are +VE Supply and both connect to pins 1 and 2

The two brown wires are Supply Ground and both connect to pins 8 and 9

Pins 3 through 7 are the traffic recievers digital interface:
Purple/violet connects to pin 3
Yellow connects to pin 4
Blue connects to pin 5
Black connects to pin 6
Green connects to pin 7

Dec 30, 2008 | Garmin GTM 12 FM TMC Traffic Receiver...

1 Answer

Garmin c330 battery replacement

The 3 wires are because the unit has a pcb on the battery which prevents over charging or shuts it off if the voltage falls too low. You can either use the pcb which is attached to the outside of the original battery (cut off the unit and reattach to the new battery with electrical tape) then solder the red and black wires to the appropriate Garmin wires or order a battery with built in pcb, If you do this, the green wire is not used, just solder the red and black wires from the plug-in connector to the new battery. It worked on my C330.

Dec 11, 2008 | Garmin StreetPilot C330 GPS Receiver

1 Answer

Plenio vxa-2000 antenna pinout

If you are looking at the external connection end with it in a "V" position, on the right - the upper one is green & the lower one is red. On the left - the upper one is yellow & the lower one is black (or the big bunch of copper wires). Be sure you are reconnecting an exact pin set up - an s-video is not the same (unfortunately). If you found a replacement antenna or a correct replacement part, please let me know where. I have to repair mine too.

Oct 27, 2008 | Digital Video Systems Plenio VXA-2000 GPS...

2 Answers

Can I connect the wires from a car charger to the connections under the unit ?

An alternative is to use a navman P1 "hotshoe" This allows charging to be carried out through the bottom strip connector.
Available from Magicgadgetz at a cost of £20

Oct 22, 2008 | Navman F20 GPS Receiver

1 Answer

My garmin c330 will not charged

Disassemble then disconnect speaker/battery connector from printed circuit board. Individually cut the red, green and black wires from the battery. Tape over the wire ends of the connector and battery wires that were cut. Re-assemble and unit will work when plugged into 12Vdc. If you want to use the battery, it must be charged with an external Li-Ion charger using red + and black - for the charging connections to the battery. With the connector to the pc board disconnected, solder and tape the battery wires to the connector wires where cut. Re-assemble and it will work & charge.

Jan 13, 2008 | GPS Devices

1 Answer

Broken Power adapter

external power adapter? if you broke open the gps receiver and used any glue make sure you didnt coat the silver looking tiny metal parts or you just insulated them from the power adapter.. scrape off the glue gently with a small flat screwdriver. double check your wires to it the center conductor is usually white or red but the outer is ground or copper braid or black wire also check and make sure you didnt solder splash short the connector. gently tug on both wires if they bust loose you need to resolder proper 60-40 rosin core. adapter problems is easy . get a meter and check for voltage out from it should be like 14 if rated 12v. also you can just plug it up and trace to point where the voltage is lost to battery. good luck

Aug 21, 2007 | Navman F20 GPS Receiver

Not finding what you are looking for?
Garmin GPS 126 GPS Receiver Logo

327 people viewed this question

Ask a Question

Usually answered in minutes!

Top Garmin GPS Devices Experts

Tom Chichester

Level 3 Expert

22566 Answers

Jonathon summesfield

Level 2 Expert

284 Answers

Bill Gilhooly
Bill Gilhooly

Level 2 Expert

94 Answers

Are you a Garmin GPS Device Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides