I assembled the ArduPilot Mega and oilpan, and everything seems to work except for the GPS. I'm using the 1Hz EM-406A, and tried connecting to both the oilpan 6-pin connector, and the ADP mega connector, but I don't get any output when running the GPS_NMEA_test or GPS_UBLOX_test. The init message is written to the serial window but no position data (i.e. no valid data...).
Anyone else had similar GPS issues with mega?