After installing a aftermarket Monoblock amp for my after market 12" subwoofer i'm having trouble with my navigation. The GPS of the navigation is not giving the right road when i'm on the move. I allready calibreted the navigation twice but it does not follow the right road when i'm on the move again.

So what's the problem here?? doe any one got a idea what i could be??

The Amp and navigation player are on the same side in the trunk of the car so could the amp disturb the navi player??

 

Is it possible you unplugged the GPS antenna from the nav? Or possibly jostled the antenna itself when removing the rear deck or installing the sub? If the antenna is not getting a signal, it certainly won't follow where you are, and that whole area is where you should focus your troubleshooting efforts. Make sure all connectors are seated properly, no wires coming out of pins, etc.

Big Mack

 

Every thing is where it shoot be. i probebly found the problem. Some wirers where crossed under the carpet in the trunk. The ground wire was laying over the GPS signal cable.

 

We have rerouted the wires but still have the problem that my GPS signal is slow. When i calibrate it and go for a drive. The navigation is off by 100feet after 5mins.