Okay, I have a weird issue here with the X5 and the JVC NX7000 Navigation. It doesn't seem to have enough power to load up the MAP on the navigation and therefore it says "Lost GPS Signal", now I know this is not the fault of a bad navigation system because it works fine whenever i go ahead and disconnect the terminals from the battery and reconnect them. Once I do that everything seems to work for a few hours (even after turning off and on the X) and then it would again seem weak with power and say LOST GPS Signal.

Could this be a fault of a fuse or my alternator ? anyone?