B0193 - Front Blower Motor Speed Circuit
Repair Importance Level:
Repair Difficulty Level:
Possible causes
- Faulty Front Blower Motor
- Front Blower Motor harness is open or shorted
- Front Blower Motor circuit poor electrical connection
- Faulty Blower Motor Control Module
Tech notes
B0193 01: Front Blower Motor Speed Circuit Short to BatteryB0193 06: Front Blower Motor Speed Circuit Low Voltage/Open
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
B0193 Description
The Blower Motor Control Module is an interface between the Heating, Ventilation, and Air Conditioning (HVAC) Control Module and the blower motor. The blower motor speed control from the HVAC control module, battery positive and ground circuits enable the blower motor control module to operate. The HVAC control module provides a Pulse Width Modulation (PWM) signal to the blower motor control module in order to command the blower motor speed. The blower motor control module transfers the PWM signal into a corresponding blower motor voltage. The voltage resides between 2-13 V and changes linear to the height of the PWM signal.
B0193 Information for specific makes
- B0193 BUICK Front Blower Motor Speed Circuit
- B0193 CADILLAC Front Blower Motor Speed Circuit
- B0193 CHEVROLET Front Blower Motor Speed Circuit
- B0193 GMC Front Blower Motor Speed Circuit