It is quite obvious, that one day you start your car and find out that your GPS system is not working. There should be error either in installed GPS device in your car or your phone might be having some issue with the installed Garmin GPS application.
Hence it is suggested to check both the areas properly and rectify the problem. We need to understand that first we have to find out the problem then solution can be applied. Assuming that, the GPS device in car is not workingand facing problem to start the GPS, first of all you have to make sure that car’s ignition is switched on, and see if the power supply is on for GPS navigation device. If it’s still not starting, in that case you should check the fuse also.
Now if everything is ok with the GPS device in the car, then check the installed application on your android that you have switched on the location and application is updated properly with latest version. Also you can restart your phone and problem may get sorted by doing this simple step.