Ford OBD-I Self-Test Hookup Diagram - DLC & STI Connector Jumper Wire (Taurus)

This document is a schematic-style diagram showing how to hook up for reading OBD-I diagnostic trouble codes on a Ford EEC-IV system. It illustrates the Data Link Connector (DLC) with its multiple cavities, and shows where the Self-Test Input (STI) connector is located on a pigtail wire coming from the vehicle harness. The diagram indicates that a jumper wire is connected between the STI connector and the DLC to trigger self-test mode, which flashes codes on the Malfunction Indicator Lamp (labeled 'MALFUNCTION INDICATOR LAMP (WITH JUMPER WIRE)'). A note states that on the Lincoln Continental, codes are displayed via the message center instead ('MESSAGE CENTER (CONTINENTAL ONLY)'). Arrows show the wiring routing 'TO VEHICLE HARNESS.' The figure carries the reference number A11516-E. A reader can learn the physical identification of the DLC and STI connector and the jumper-wire method used to initiate the self-test and read codes without a dedicated scan tool. The document itself is undated and does not state a specific model or year, though it was uploaded to a 1993 Ford Taurus gallery.