Diagnostic Link Connectors for EEC-IV processors ('84-95). '84-86 located on R wheelwell near starter relay. '87-95 located under L hood hinge. Connect FP Relay to any ground to force the fuel pump(s) on when the key is in RUN. Connect STO to SIGRET to trigger diagnostic modes. Consult the 7th post on this page for more info:
http://www.fordf150.net/forums/viewtopic.php?t=71346
If the CEL is burned out, connect pin C to a 12V test light, and the light's other terminal to B .
Pins D & F are a primitive SCP bus, but on these old vehicles, nothing else was networked in.
'96-up use OBD-II, and this DLC:
![dlc-eeciv.jpg Diagnostic Link Connectors for EEC-IV processors ('84-95). '84-86 located on R wheelwell near starter relay. '87-95 located under L hood hinge. Connect FP Relay to any ground to force the fuel pump(s) on when the key is in RUN. Connect STO to SIGRET to trigger diagnostic modes. Consult the 7th post on this page for more info:
http://www.fordf150.net/forums/viewtopic.php?t=71346
If the CEL is burned out, connect pin C to a 12V test light, and the light's other terminal to B .
Pins D & F are a primitive SCP bus, but on these old vehicles, nothing else was networked in.
'96-up use OBD-II, and this DLC:
[url=http://www.supermotors.net/vehicles/registry/media/174488][img]http://www.supermotors.net/getfile/174488/thumbnail/dlc96broncoc201.jpg[/img][/url]](http://www.supermotors.net/getfile/245234/fullsize/dlc-eeciv.jpg)
