The obd 1 port is next to the battery
1993 is OBD 1
Under the dash on the driver side.
The OBD 1 port is under the dash on the driver side. It is a blue connector that has six wires in it.
On a 1993 Mercury Grand Marquis ( which is OBD I , EEC IV ) ( there should be an EEC TEST connection in the engine compartrment )
The data link connector is under the dash on the driver side.
Your EEC test port is in the engine compartment by your power distribution box EEC IV / OBD I system
Right next to your knee when you are sitting in the drivers seat. the diagnostics port is under the hood, behind the battery.
1993 is OBDI not OBDII. The connector is under the hood, near the left hood hinge.
The OBD port is under the dash on the driver side.
good luck! There is no OBD port on a vehicle that old
Obd-on board diagnostic. The port is the plug the scan tool or code reader connects to.
OBD II port should be under the dash on the drivers side.