Blower Motor Always On

TEST DESCRIPTION

Steps 1-9:

The number(s) below refer to the step number(s) 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 speed 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.

For a description of the RPO Code(s) shown in this article/images refer to the RPO Code List found at Vehicle/Application ID RPO Codes