Power Module

The power module controls the operation of the compressor clutch and the blower motor. It is located on top of the evaporator assembly in the HVAC air stream.

The power module receives the blower drive signal from the programmer and amplifies the signal to a strong output voltage proportional to the input. The power module is also transistorized, and can provide variable blower speeds.

The power module also receives a drive signal from the ECM, which is used to engage the A/C compressor clutch. The BCM controls the cycling of the clutch based upon its inputs.