Heater makes horrible noise when turned on

BLOWER MOTOR

INSPECTION

REMOVE GLOVE COMPARTMENT DOOR
REMOVE ENGINE (and ECT) ECU
Disconnect the connectors.
Remove the 2 bolts and engine (and ECT) ECU.

Two way flow heater models only: REMOVE AIR DUCT (Motor cover)
Disconnect the control link.
Disconnect the connectors.
Disconnect the connector clamps.
Disconnect the wire harness clamps.
Remove the screw.
Release the claw and remove the air duct.

REMOVE BLOWER MOTOR
Disconnect the connector.
Remove the 3 screws and blower motor.

INSPECT BLOWER MOTOR OPERATION Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 2, then check that the motor operations smoothly.
If operation is not as specified, replace the blower motor.

INSTALL BLOWER MOTOR
Two way flow heater models only: INSTALL AIR DUCT (Motor cover)
INSTALL ENGINE (and ECT) ECU
INSTALL GLOVE COMPARTMENT DOOR