- 1). Park on level ground. Make sure the 1994 Ford's air conditioning is off. Engage the parking break and shift the vehicle into neutral or park.
- 2). Warm up the Ford's engine to its standard operating temperature, then turn off the engine and electrical systems. Leave the key in the ignition.
- 3). Open the hood. Look for two connectors in the back of the engine compartment. One has six sides and features six slots. This is the self-test outlet. The other connector has only one slot and is a lot smaller. It is the self-test input.
- 4). Connect the self-test outlet and input with jumper wire.
- 5). Return to the driver's seat and turn the key in the ignition. Do not start the engine, but get the electrical system running.
- 6). Count how many times the check engine light flashes at you. There is a pattern to the flashes you will need to know in order to interpret the code. Short pauses between flashes indicate the beginning of a number within a code. Longer pauses indicate the beginning of a new code number. For example, an EEC-IV code 52 will flash five times, followed by a slight pause, followed by two more flashes. If there is more than one trouble code, there will be a longer pause before check engine light flashes again. Write the codes down as they are flashed to you.
- 7). Turn the engine off and remove the Ford's key. Remove the jumper wire from the engine and close the hood. Go online to find the definitions for the Ford's flash codes you wrote down (see Resources). Once you have found and read the definitions, you will know the engine's problem spots.
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