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International Automotive Technicians Network
Re: 1989 Ford Truck F 250 4WD Pickup V8-460 7.5L
Posted to Technical Discussion Forum on 1/20/2007 4 Replies

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Are these all feed from the same VREF? If so, check to see if any of these are shorted pulling you VREF to ground.

If no short to ground, check all PCM powers and grounds next.

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