Blower Motor Always On

BLOWER MOTOR ALWAYS ON

TEST DESCRIPTION

Steps 1-9:

The numbers below refer to the step numbers on the diagnostic table.
2. This step checks for continuous operation of the blower motor.
3. This step tests for a short to voltage in the mode switch output and the LO, M1, M2, and HI blower motor control circuits. It is easiest to perform this step by disconnecting the blower motor resistor assembly connector, and probing each speed control circuit with a test lamp connected to a known good ground.