Test H: The Blower Motor Does Not Operate Correctly
PINPOINT TEST H: THE BLOWER MOTOR DOES NOT OPERATE CORRECTLYNormal Operation
Under normal operation, the blower motor is provided a ground from the blower resistor through circuit 261 (OG/BK). The resistor gets a ground from circuit 57 (BK) in the lowest blower setting. In MED-LO and MED-HI the resistor gets a ground through circuit 260 (RD/OG) or 269 (LB/OG), depending on selected speed. In HI, the blower motor is grounded directly through the blower switch from circuit 261 (OG/BK) to circuit 57 (BK). The blower switch receives its ground from circuit 57 (BK).
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Blower motor resistor
- Blower motor switch
H1-H3:
H3-H4:
H5-H7:
