The Engine Control Module (ECM) on a 1993 Ford Ranger is typically located
under the hood, near the firewall, often attached to the inner fender well. However, the exact location can vary slightly depending on the engine and options on your specific truck. It's usually a fairly sizable black box with wiring harnesses connected.
To be absolutely certain, consult your 1993 Ford Ranger's owner's manual or a repair manual specific to your year and model. A visual inspection under the hood, looking for a large black box with numerous wiring connectors in the general area described above, should help you locate it.
