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yes there is an ECM plug in engine bay take cover off and plug a jumper wire to these 2 pins .. jump pin 2 to test wire as shown in diagram .. then go inside the van and turn the key to on (dont start) and the check engine will start to flash .. read the flashes.

http://www.troublecodes.net/Ford/

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Q: Is there a way to read the trouble codes on a 94 Aerostar without the code scanner?
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