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Garmin Bare Wire Power and Data Cable Product Detail
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Garmin Bare Wire Power and Data Cable Tips NOTE: DO NOT USE for the 12, 38, or 40. You may destroy the GPS receiver as it requires a lower voltage.
Garmin Bare Wire Power and Data Cable Description This cable is terminated at one end with a molded GARMIN plug (to mate with the GPS receiver), and has four color-coded bare wires at the other end: 1.power, 2.ground (for both power and signal), 3.data out, and 4.data in. Use it to permanently hard-wire your power and/or data connections for your GPS receiver.
This cable was the original 'fix' for the problem of powering the Garmin units while trying to get data out of them at the same time (due to Garmin's 'single connector' design on their units). If you are not a soldering expert or don't have the time, try the PC COMBO CABLE for the car or the AC/PC COMBO CABLE for in the home.