I picked up one of these GPS units at a local Radio Rally for a few pounds.
The unit came without its power adapter unit, just a female 9 pin D Type connection, so it was necessary to construct one.
After a few minutes probing around inside I soon found the connections.
Red wire on pin 5 = 5v DC
Black wire on pin 1 = Ground = connect to DC Ground and pin 5
White wire on pin 3 is RS232 input = connect to pin 3 TXD
Green wire on pin 4 is RS232 out = connect to pin 2 RXD
