1993 is OBDI not OBDII. The connector is under the hood, near the left hood hinge.
The OBD connector is under the dash on the driver side
The 2003 Dodge Grand Caravan OBD 2 port is on lower edge of dash above parking brake pedal
The 2001 Pontiac Grand Am OBD 2 port is on lower edge of dash; left of steering column
The 2002 Pontiac Grand Am OBD 2 port is on lower edge of dash; left of steering column
The 2003 Dodge Caravan OBD 2 port is on lower edge of dash above parking brake pedal
There should be an EEC TEST connection in the engine compartment ( a 1994 Mercury Grand Marquis is OBD I , EEC-IV )
It is under the dash on the driver side.
It is under the hood on the driver side.
Near the left hood hinge, clipped into a protective cover.
Near the left hood hinge, clipped into a protective cover.
The link below has a complete list of OBD 2 codes