Operation CHARM
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Ford Truck
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1987
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Aerostar L4-140 2.3L SOHC
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Repair and Diagnosis
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Relays and Modules
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Relays and Modules - Instrument Panel
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Speedometer Module
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Description and Operation
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Digital Speedometer Operation
Digital Speedometer Operation
The electronic speedometer module receives a signal from the transmission mounted magnetic speed sensor. The maximum speedometer readings are 85 mph or 199Km/H in the metric code.