C291 black data link connector (DLC) pinout with circuit numbers…
Reference · 1987-1991 F-250All 32 wiring diagrams
Pinout of the black 16-pin data link connector C291 showing Data (+/-), ISO link, grounds, reprogramming power and hot-at-all-times power.
Part of 1987-1991 Ford F-250 Wiring Diagrams
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