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Home >> Lincoln >> 2004 >> Aviator AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 352 (Climate Control System) >> Diagnosis And Testing >> Climate Control System >> Pinpoint Test L: The Blower Motor Is Inoperative >> Normal Operation

Normal Operation

WARNING: This page is about a different car, the 2003 Lincoln Aviator. However, it is still accessible from the selected car via links, so may be relevant.

Under normal operation, the blower motor relay coil receives a ground through circuit 1205 (BK). The coil receives voltage from the DATC module through circuit 575 (YE/BK) when the DATC is ON. Voltage is supplied to the relay contacts from circuit 538 (GY/RD). When the relay coil is energized, voltage is delivered to the blower motor through circuit 371 (PK/WH). Ground for the motor is provided through circuit 536 (BK/LG) from the blower control module. Ground for the blower control module is provided by circuit 1205 (BK).