Test H: No Operation In Lower Speeds

PINPOINT TEST H: NO OPERATION IN LOWER SPEEDS

H1-H2:

H2-H3:

Normal Operation
Under normal conditions, when the blower motor switch is placed in the low, M1 or M2 positions and the function selector switch is in any position except OFF, the blower motor switch completes the circuit 261 (OG/BK) from the blower motor through the blower motor resistor, and to ground. The current flows through 1 to 3 resistors, depending on the selected blower motor speed.

Possible Causes
- Blower motor resistor
- Circuit 261 (OG/BK) short to ground
- Blower motor switch