Test G: The Blower Motor Does Not Operate Correctly

PINPOINT TEST G: THE BLOWER MOTOR DOES NOT OPERATE CORRECTLY

G1-G3:

G3-G4:

G5-G7:

G8-G9:

G10:

Normal Operation
Under normal operation, the blower motor is provided a ground from the blower resistor through circuit 261 (DG/BK). The resistor gets a ground from circuit 1205 (BK) in the lowest blower setting. In MED-LO and MED-HI the resistor gets a ground through circuit 754 (LG/WH) or 752 (YE/RD), depending on selected speed. In HI, the blower motor is grounded directly through the blower switch from circuit 261 (DG/BK) to circuit 1205 (BK). The blower switch receives its ground from circuit 1205 (BK).

Possible Causes
- An open in circuit 1205 (BK), 261 (DG/BK), 754 (LG/WH) or 752 (YE/RD)
- A short to ground in circuit 261 (DG/BK), 754 (LG/WH) or 752 (YE/RD)
- A short together circuits 261 (DG/BK), 754 (LG/WH) or 752 (YE/RD)
- Blower motor resistor
- Blower motor switch