@mark.s Hi all, Can anyone suggest how I might fix my sat nav. when the nav button is pushed a message comes up on the screen "Navigation activated please wait". After about 20 minutes or so this then changes to "Navigation cannot be activated" or words similar. I have tried all the simple stuff like removing the CD in the boot and removing the fuses for an hour etc. It is no coincidence that it stopped working shortly after I had installed the electrics for a towbar, however all I did was pick up a 12v supply from a free connection and join in the four wires into the harness for indicators, sidelights and brake lights, but it is possible that I disturbed some wiring. Someone in the past has fitted a JVC rear view camera and made a bit of a mess of the wiring, however the sat nav up until now has been working fine. Can anybody help please. Thank you.