Test N: The Blower Motor Is Inoperative - EATC

PINPOINT TEST N: THE BLOWER MOTOR IS INOPERATIVE - EATC

N1-N2:

N2-N4:

N4-N6:

N7-N8:

N9-N11:

N11-N12:

Normal Operation
Under normal operation, the blower motor relay coil receives ignition voltage. Voltage is supplied to the relay switch contact. The coil receives ground from the remote climate control (RCC) module through circuit 275 (YE)/276 (BN) if any function except OFF. When the relay coil is energized, voltage is delivered to the blower motor control module through circuit 371 (PK/WH). Ground for the blower control module is provided by circuit 57 (BK). The RCC module sends pulse width modulated signal to the blower control module through circuit 776 (OG/BK) to control the blower speed. Voltage is provided to the blower motor from the blower motor control through circuit OG. The blower motor is grounded through the blower motor control through circuit BK.

Possible Causes
- An open in circuit OG, BK, 57 (BK), 275 (YE)/276 (BN) or 371 (PK/WH)
- A short to ground in circuit 776 (OG/BK)
- Fuse
- Blower motor relay
- Blower motor control module
- Remote climate control (RCC) module