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I need a wiring diagram for a Garmin GPSmap 172

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Copy and paste this link into your browser. This is the complete owners manual that should include all diagrams. Hope it helps :)

Posted on Aug 22, 2008


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Degaussing is not something that ever needs to be done on this device.

Degaussing is a term that I learned many years ago - it was a process performed periodically on early CRT (cathode ray tube) displays (such as a TV). Over time, CRT displays would build up magnetic charges that would cause the image to become distorted. A degaussing wand would be connected to an AC outlet and then brought very close to the display and gradually withdrawn. This would neutralize the magnetic charges on the display - and the resulting distortion. Years later, manufacturers incorporated a degaussing coil inside the display's cabinet that did the same job as the degaussing wand - thereby making the wand obsolete.

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The model number of your unit has been cut off so I can't find exact instructions. I found a page here where the guy said he held down Enter and Page keys while turning the unit on.

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