Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSBUICK1999LESABRE V6-3.8L VIN KREPAIR AND DIAGNOSISRELAYS AND MODULESRELAYS AND MODULES - HVACCONTROL MODULE HVACDESCRIPTION AND OPERATIONHVAC SYSTEM - AUTOMATICBLOWER CONTROL MODULE DESCRIPTION
1999 Buick LeSabre V6-3.8L VIN K
Blower Control Module Description
1999 Buick LeSabre V6-3.8L VIN KSECTION Blower Control Module Description
The [1][2]blower control module is a solid state device that operates the blower motor. The blower control module outputs a voltage the varies between 0 volts when the blower motor is OFF and a maximum blower speed of 12 volts.
In order to determine the appropriate output voltage, the [1][2]blower control module monitors a varying voltage signal (between 2-8 volts) from the heater and A/C programmer. The module then amplifies the signal and supplies voltage directly to the blower motor.
^ Amplifies the signal
^ Applies voltage directly to the blower motor
The heater and A/C programmer monitors the output voltage from the [1][2]blower control module.
In order to determine the appropriate output voltage, the [1][2]blower control module monitors a varying voltage signal (between 2-8 volts) from the heater and A/C programmer. The module then amplifies the signal and supplies voltage directly to the blower motor.
^ Amplifies the signal
^ Applies voltage directly to the blower motor
The heater and A/C programmer monitors the output voltage from the [1][2]blower control module.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.