Re: Sat Nav stopped working
Start from the back in the boot, maybe unplug the unit and plug it back in see what happens.
Then move to the rear seats (in the car not the boot) on the passanger side corner piller (above the speaker if you have them fitted on the P-self) remove the cover, this is where the second connection point is! PS, make sure you have very clean hands as the cover get filthy!
I wouldnt even go into the rooflineing, its a messy job......
Back into the CD reader if you think is it the GPS cable, the small gray plug is the PGS arial fitment type (being with H...) Go to a GPS shop and ask if you can try an aftermarket arial. Maybe it is just taking time to lock into the signal, connecting when the car is stationary, could be as simple as that!