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Wiring diagram for 1990 Ford F-250 EATC and PCM system

Wiring diagram for 1990 Ford F-250 EATC and PCM system
Wiring diagram for 1990 Ford F-250 EATC and PCM systemOriginal file
Wiring diagram for 1990 Ford F-250 EATC and PCM system

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This is a wiring diagram for a 1990 Ford F-250, detailing the Air Conditioner/Heater Electronic Automatic Temperature Control (EATC) system and its connection to the Powertrain Control Module (PCM). It illustrates power distribution, relays, solenoids, and various circuit connections.

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