Test F: The Blower Motor Is Inoperative
PINPOINT TEST F: THE BLOWER MOTOR IS INOPERATIVEF1-F2:
F2-F4:
F5-F6:
F6-F7:
F7-F8:
F8-F9:
F9-F10:
Normal Operation
Under normal operation, the blower motor relay coil receives ignition voltage. The coil receives ground from the EMTC module through circuit 364 (BK/LG) if any position but OFF is selected. Voltage is supplied to the relay switch contact. When the relay coil is energized, voltage is delivered to the blower motor through circuit 371 (PK/WH). Ground for the blower motor is provided through circuit 261 (DG/BK) from the blower resistor or the blower switch (HI). The blower resistor and blower switch is grounded through circuit 1205 (BK).
Possible Causes
- An open in circuit 261 (DG/BK), 1205 (BK), 371 (PK/WH), 364 (BK/LG) or the relay coil and switch supply voltage circuit
- Blower motor
- Blower motor relay
- EMTC module