Attention! Do not connect the enclosed Garmin USB cable toyour computer until you have loaded the MapSource software.Step 1: Install nRoute1. Insert the DVD into your computer’s DVD-ROM drive. If auto-run isenabled, your computer will automatically display a welcome screen.If the start-up file does not run automatically, click the Start button,select Run…, and then type the drive letter of your DVD-ROM drivefollowed by setup (example: “E:\setup”). Press Enter.2. Click Install nRoute and follow the instructions on your computerscreen.Step 2: Connect the GPS 18 to Your ComputerGPS 18 PC1. Connect the 12-Volt adapter to your vehicle’s 12-Volt receptacle.2. After properly mounting the GPS 18, routing thecable to your computer, and installing nRoutesoftware, insert the DB-9 connector into anavailable DB-9 (9-pin) serial port on your computer.3. Tighten the knobs on the serial connector to securethe GPS 18 to your computer. GPS 18 PC (DB-9Serial) connector