W 250 Pickup L6-359 5.9L DSL (1989)
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If the air intake temperature is at or below 54~F (12~C), then the thermistor is closed, allowing voltage to flow to the KSB solenoid. When the
intake air temperature increases above 60~F (16~C), the thermistor will open, DE-ENERGIZING the KSB solenoid.
