Thread: which new maps will work on Nuvi 1490

got the unit back.
I put the gmapsupp.img and the gmap3d.img files onto an micro sd card in a directory named Map. unlocked them.

Copied the D2504180A.JCV file to the .system/JCV folder in the unit.

Renamed the gmapprom.img to gmapprom.im_ and gmapprom.sum to gmapprom.sum in the .system of the unit.

Put the card into the unit and switched it on but it will not reed the maps.

I switched the unit on went into Tools/Settings/Maps/info and the screen doesn't show any maps at all. before, it would display CN Europe NT 2011.10.

When the unit is plugged into windows explorer it show the card as a separate drive.

I found the GarminDevice.xml file and opened it in visual studio. the file paths were correct for the map files.