Map lost - Garmin Nuvi 660 GPS Receiver

The most likely reason is that the map has become unselected.

1. Touch the wrench icon on the Where to/View map screen
2. Touch Settings
3. Touch Map
4. Touch Map Info
5. Select the checkbox next to the maps to be enabled on the device

1. Log into your myGarmin account
2. Select Manage Maps
3. Select Details
4. The unlock code is located under the Installed Maps.

1. Plug your Garmin device into the USB port
2. Double-Click on My Computer or Computer located on the desktop
3. Right-Click on the Garmin or nuvi drive
4. Click Explore
5. Double-Click on the Garmin folder
6. Right-Click in a blank space in this window
7. Move your mouse over the word New
8. Select Text Document
9. Press Enter / Return on your keyboard
10. Double-Click on the New Text Document. This will open the New Text Document in a window called Notepad
11. Type the unlock code that is listed in the Manage Maps section of your myGarmin account in all upper-case letters with no spaces
12. Select File
13. Select Save As
14. Change the Save As Type to All Files
15. Type gmapprom.unl in all lower-case letters for the File name
16. Select Save
17. Close the Notepad window
18. Delete the New Text Document file
19. Disconnect the GPS device from your computer

1. Open the TextEdit application located in the Applications folder on the Mac HD
2. Click Format
3. Select Make Plain Text
4. Type in the unlock code that you retrieved from your mygarmin account. The unlock code should be in all capital letters and with no dashes.
5. Click Save As and name the file as gmapprom.unl (Note: Be sure to uncheck the box If no extension is provided, use .txt)
6. Copy the gmapprom.unl file to the GARMIN folder on your device. (Note: Save the file directly to the Garmin mass-storage device if connected)

1. Plug your Garmin device into the USB port
2. Double-Click on My Computer or Computer located on the desktop
3. Right-Click on the Garmin or nuvi drive
4. Click Explore
5. Double-Click on the Garmin folder
6. Right-Click in a blank space in this window
7. Move your mouse over the word New
8. Select Text Document
9. Press Enter / Return on your keyboard
10. Double-Click on the New Text Document. This will open the New Text Document in a window called Notepad
11. Type the European unlock code that is listed in the Manage Maps section of your myGarmin account. This will need to be typed in all upper-case letters with no spaces
12. Select File
13. Select Save As
14. Change the Save As Type to All Files
15. Type gmapprom1.unl in all lower-case letters for the File name
16. Select Save
17. Close the Notepad window
18. Delete the New Text Document file
19. Disconnect the GPS device from your computer