my navigation was working great until this past week. Sometimes when i start the car the navigation wouldn't even turn on, after a couple time of restarting the car, the navigation would work but required password as if i have just disconnected the battery. Battery connection looks good and radio and cd player still works, any suggestion guys? thx

 

I have been experiencing the same problem for months, navi with either work fine, not at all, or at times restart while im driving, no idea whats causing it, seems to work better after taking off battery cables but problem still occurs, getting car re-wired next week will let you know if this helps