How to Clean, Upgrade, Repair, Mod, Disassemble a GPS Navigation Device

Here is a collection of free do-it-yourself take apart instructions, disassembly pictures, upgrade and repair manuals, as well as modding and cleaning tutorials for GPS navigation devices. If you have written a guide yourself (or if you know of tips and tricks not mentioned here), please submit a new entry.

Delorme Tripmate	Self-start and external power mod (some pin-outs included).
Delorme Tripmate	This navigation device is designed to operate on 6 volts DC. You can run it off 4 AA batteries that mount inside it's case. But it's possible to modify the navigation device for a 12 volt power supply and use in APRS.
Delorme Tripmate	Installing an APRs TNC directly inside of the GPS device.
Delorme Tripmate	Building a tracker from an old GPS. Layout and Wiring diagrams from the MIM experiment.
Delorme Tripmate	How to build an adapter to work with the Tinytrak 3 APRS controller.
Fortuna GPSmart - BT	Some pictures of the internals.
Garmin GPS III	This HOWTO shows two ways to extend the battery life: you can either take apart the housing and solder a better battery in or you can build a battery pack (in German).
Garmin eTrex	Pinout of the round connector, being used with the Garmin 12, 12xl, 38, 40, 45, 48, 76, 89, 90, 92, 176, 295, GPS II, II+, III, III+, V and Street Pilot.
Garmin eTrex	How to use a piece of credit-card (or any suitable plastic) for hacking the proprietary connector.
Garmin eTrex	Dead GPS device? - How to open, disassemble and repair the navigation device.
Garmin eTrex Vista	How to fix problems with the click-stick caused by a bad electrical contact. A complete guide with detailed take apart pictures.
Garmin eTrex/eMap	How to build a GPS & data cable for the Kenwood D7A transceiver.
Garmin 38/40/45/90	Some photos of the internals.
Garmin GPSmap 76Cs	Shock-Proof your GPS to prevent unintended power-downs.
Garmin Map 176/176C	Schematics for a cable to hook a GPS to a Handspring Visor PDA.
Gumstix	Active antenna modification: the GPS Stix daughter board comes set up for passive antennas only, to get it to work with a passive antenna you need to make a small modification.
Magellan 310, 315, 320	Due to the high price of the "official" datacable, it's worth to make a homemade cable to connect the GPS device to a PC.
Magellan 315/320	This guide shows how to make a custom data cable (in Finnish).
Magellan 2000	A picture of the innards: the 44 pin PLCC in it's socket.
Magellan Meridian	Selfmade USB data & power cable.
Magellan Meridian	How to build a custom power cable (in German).
Pretec compactGPS CF-Card	How to modify the CompactFlash Card to work with a standard serial port. This modding will allow you to use the device using your PDA serial port, a PC serial port, and a PDA/GPS car kit.
Silva Atlas (aka Lowrance iFinder, Brunton Atlas)	9-pin RS-232 cable pinouts.
TomTom Go 300	Dismantling instructions and pictures.
TomTom Go Car Docking Station	Dissection with take apart pictures.
TomTom Go	Quick and dirty connector. Making a connector is quite easy. All you need is a PCB with suitably arranged traces, plus some things to act as spacers. Pieces of a PCB work great for this.
TomTom Go	A cheap and easy device stand made from a Printed Circuit Board - PCB.
T-Mobile NaviGate GPS Mouse (aka Falcom NAVI-1)	Here are instructions to remove some NMEA protocol restrictions of the GPS mouse for S60 SmartPhones.
XAiOX NavOne Bluetooth GPS-Receiver	How to take apart the GPS mouse. An illustrated guide (in German).

DIY GPS Devices and Accessories

DIY DGPS	Design information for a differential GPS (DGPS) receiver.
DIY GPS Tracker	A small do-it-yourself GPS tracker device with no display, which stores waypoints on a MMC/SD card (in German).
DIY GPS Logger	A selfmade NMEA waypoint logger with serial RS-232 interface (available in German also).
SeaTalk NMEA Bridge	How to connect SeaTalk and other NMEA devices (in German).
DIY Frequency Normal	How to make a ham radion frequency normal based on GPS signals (in German).