Test Q: The Auxiliary Blower Motor Is Inoperative
PINPOINT TEST Q: THE AUXILIARY BLOWER MOTOR IS INOPERATIVENormal Operation
Under normal operation, the auxiliary blower motor relay coil receives a ground through circuit GD149 (BK/GY). The coil receives voltage from circuit CH123 (VT/GN) when the HVAC module - electronic automatic temperature control (EATC) is ON or the function selector switch is in any position but OFF. Voltage is supplied to the relay contacts from circuit SBB18 (YE/RD). When the relay coil is energized, voltage is delivered to the blower motor through circuit CHA02 (BN/GN). Ground for the motor is provided through circuit CHA08 (GN/OG) from the resistor and switch. Ground for the resistor and switch is provided by circuit GD149 (BK/GY).
This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- Auxiliary blower motor
- Auxiliary blower motor relay
- Front auxiliary climate control assembly
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