[cycleguy55]

Ford EEC-IV/TFI-IV Electronic Engine Control Troubleshooting
https://therangerstation.com/tech_li...agnostic.shtml

Fords Without a Check Engine Light

1. Start the vehicle and let the engine warm. Then, turn the engine off. [Note: yes, I'm aware the car won't run. Obviously you will have to skip this step.]
2. Set the volt meter to read between 0 and 15 DC volts. Connect your volt meter's positive lead to the postive terminal on the Ford's battery. Then, connect negative lead to the self test outlet's grounding slot.
3. Connect the self test outlet's signal return slot to the self test input with a jumper wire.
4. Turn the Ford "On," but do not start the engine. Count the times the needle sweeps. There will be a small pause between numbers within the code. Code 14, for example, will have one needle sweep, followed by a pause and then four more needle sweeps. Long pauses indicate the beginning and end of a new trouble code.

http://diagnosecarproblems.blogspot....rd-eec-iv.html