The sat nav on my 2001 P38 4.6 vogue has developed a blank white screen, the disc holder in the rear also now keeps discharging & re engaging the cd disc. At this same time I have lost the volume control on my radio. Would be grateful for any solutions .Regards.

 

replace nav unit

 

You may want to check your wiring from the battery to the main fuse/relay case under the hood. My Nav wasfried because of a shortbetween the battery and the main fuse box.Being that I didn't use the Nav very much, didn't have the $1800 to replace it,and only wanted my volume control back, I rewired the stereo around the Nav controler in the back. Without this, the Nav amp will continue to mute the Radio down to a "moderate colume" until it is replaced. ($1800)