- 1). Cut the plug off the end of the Garmin GPS antenna's cable with a scissors. Slit 3 inches in on the insulation from the cut end using the blade of a utility knife. Peel the insulation back. Strip 1/2 inch from the ends of the two wires using a wire strippers.
- 2). Heat up a soldering iron for five minutes. Place the replacement power plug -- compatible in design with the one that's broken -- on a work surface with the open end facing towards you.
- 3). Hold one end of a piece of solder to the end of the black wire in the cable. Place the tip of the soldering iron against the end of the solder for two seconds. Remove the soldering iron and let the solder cool for a minute. Repeat this step with the other wire in the cable.
- 4). Place the soldered end of the black wire in the cable against the side of the socket on the bottom of the plug. Place the tip of the soldering iron against the end of the solder for two seconds. Remove the soldering iron. Let the solder cool for a minute. Place the soldered end of the other wire in the cable into the center of the socket. Repeat the soldering procedure. Let the solder cool for a minute.
- 5). Wrap a strip of electrical tape around the end of the wires where they meet the socket. Wrap a strip of electrical tape around the bottom of the socket to conceal the wires connected to it. Wrap a strip of electrical tape around the cable to conceal the wires that are no longer insulated. Unplug the soldering iron. Dispose of the broken plug in the trash.
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