Operation CHARM
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Ford Truck
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1993
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F 350 4WD Pickup V8-460 7.5L
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Repair and Diagnosis
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Starting and Charging
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Charging System
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Testing and Inspection
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Pinpoint Tests
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B: Series With Internal Voltage Regulator (IVR)
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B8 - F Terminal Voltage Check With Key On
B8 - F Terminal Voltage Check With Key On
^
Turn ignition on, but do not start engine.
^
Measure regulator F terminal voltage.
More than 1.5 volts --
Go to B9.
B9 - I Circuit Tests
1.5 volts or less --
Go to B1O.
B10 - Jumpered Load Test