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Why does the heater fan in your 1992 Ford truck only work on high?
Wiki User
∙ 14y ago
by the blower motor there is a resistor connection, you will find it melted
the blower motor is bad. it draws to much power causing the connection to get hot and melt and burn. you will have to change the connector and the blower motor.
the blower is still working but its drawing to much power, the motor windings are shorted out inside.
disconnect the connector from the resistor and you will see it.
Wiki User
∙ 14y ago
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