I need to smog my 1997 F250HD and I can't find the OBDll plug. I have looked under the dash on both sides of the center console and nothing. There is an EEC TEST plug in the engine compartment on the drivers side fenderwall at the firewall, but everyone says that in nothing. Is that an OBDl connector? Have there been some trucks that did not get the OBDll plugs installed and would the dealer put one in?
EEC-IV systems (OBD-I only) were still used in some 97 HD trucks, especially if it was an OBS with one of the pre-modular or diesel engines. If it was originally sold in CA, then it should have been a OBD-II regardless. If it was a 49-state model, it probably still had the EEC-IV system.
Consult the emissions decal under the hood if it's still present. The system is specified on the label.
By 1998, all trucks were running OBD-II hardware although they were programmed for OBD-I standards for the HD trucks.
Post your VIN and someone will decode it for you.
If your original owner's manual is missing, download a soft copy from www.fleet.ford.com under the PARTS AND SERVICE tab.
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company