The EEC TEST connection is in your engine compartment by the power distribution box ( OBD I / EEC IV )
O Reilleys or Auto Zone.
You need a OBD2 scanner/code reader to get stored codes and to erase them
How do you find the factory set keyless entry code for a 2004 Eddie Bauer Explorer
You will find it mounted to bottom of dash pannel above center hump in floor, well that's the connection for the code reader. the actual reader is something you have to use to retrieve the error codes.
horn location for 2004 ford explorer
blowen white smoke and gas
With a scanner/code reader. But first you need to repair the reason the light came on.
where is the fuel filter on a 2002 ford explorer
How do I find entry code on my 1997 FORD EXPLORER XLT.
location of alternator
Where is the ecm on a 03 explorer
You got to use a OBD 2 code reader or scanner