Test N: The Blower Motor Is Inoperative - EMTC

PINPOINT TEST N: THE BLOWER MOTOR IS INOPERATIVE - EMTC

N1-N3:

N4-N6:

N6-N7:

N7-N8:

N8-N9:

N9-N10:

Normal Operation
Under normal operation, the blower motor relay coil receives ignition voltage through circuit CBB67 (GN/BN). The coil receives ground from the electronic manual temperature control (EMTC) module through circuit CH123 (VT/GN) if any function selector 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 CH402 (YE/GN). Ground for the blower motor is provided through circuit CH430 (VT/OG) from the blower resistor or the blower switch (HI). The blower resistor and blower switch is grounded through circuit GD138 (BK/WH).

Possible Causes
- Fuse(s)
- An open in circuit CH430 (VT/OG), GD138 (BK/WH), CH402 (YE/GN), CH123 (VT/GN) or CBB67 (GN/BN)
- Blower motor
- Blower motor relay
- Blower motor switch
- Battery junction box (BJB)
- EMTC module