HVAC Blower Controls Circuit Description

HVAC Blower Controls Circuit Description


The blower motor is controlled by the [1][2]blower control module. The blower control module receives the requested blower speed from the Instrument Panel Integration Module (IPM) on circuit 754. When low speed is requested by the IPM approximately 9 volts will be measured on circuit 754. When high blower speed is requested approximately 3 volts will be measured on circuit 754. The blower control module receives power from the rear junction block through circuit 1340. The blower control module provides a ground for the blower motor through circuit 450.