Test N

PINPOINT TEST N: THE BLOWER MOTOR IS INOPERATIVE - MANUAL CLIMATE CONTROL

Test N1-N2:

Test N3-N4:

Test N5-N7:

Test N8-N9:

Normal Operation
Under normal operation, the blower motor relay coil receives a ground through circuit 1205 (BK). The coil receives voltage from the function selector switch through circuit 575 (YE/BK) in any position but OFF is selected. Voltage is supplied to the relay contacts from circuit 538 (GY/RD). When the relay coil is energized, voltage is delivered to the high speed blower motor relay through circuit 371 (PK/WH). Voltage for the function selector switch is supplied by circuit 1050 (LG/VT).

Possible Causes
- An open in circuit 1050 (LG/VT), 1205 (BK), 575 (YE/BK), 371 (PK/WH), 536 (BK/LG) or circuit 538 (GY/RD).
- Blower motor.
- High speed blower motor relay.
- Blower motor relay.