gauges

When I put my turn signal on and slow down to turn, my gauges sometimes go to 0 and turn off, then everything resets and the battery light comes on I'm assuming that a wire for the turn signal is shorting out behind my dash. Any other ideas as to what could be the problem?

So I'm looking for a nav unit that has a rear view camera and Microsoft Sync compatible systems. The most important thing however...is some type of OBDII scan gauge system. Something like a ScangaugeII or like my current Aeroforce Interceptor gauge. They pull real time data from the ECM and...