Cutlass Ciera L4-2.2L VIN 4 (1995)
Blower Motor: Initial Inspection and Diagnostic Overview
Circuit Operation
The Blower Motor is a variable speed motor. The higher the voltage applied to the motor, the faster the speed.
Battery voltage to the Blower Motor is supplied by the HVAC Control Assembly by way of the Blower Motor Relay. At low and medium speeds, the
voltage is stepped down by the Blower Motor Resistors. At high speed, the Blower Motor Relay is energized, removing the Blower Motor Resistor from
the circuit. Battery voltage is then applied directly to the Blower Motor through the relay. The motor will then run at maximum speed.
System Check
System Diagnosis
Perform the System Check and refer to the Symptom Table for the appropriate diagnostic procedure(s). See: System Check See: Symptom Related
Diagnostic Procedures/Symptom Table
Troubleshooting Hints
Perform begore beginning System Diagnosis
1. If the Heater-A/C Control Assembly is completely inoperative, check for poor connections at Heater-A/C Control Assembly Connector C2.
2. Check for missing or damaged connector seals at the Blower Resistors and Blower Relay.
3. Check HTR A/C Fuse if the Blower Motor is inoperative. If open, check for short to ground though CKT 141.
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Check for a broken (or partially broken) wire inside of the insulation which could cause system malfunction but prove "GOOD" in a
continuity/voltage check with a system disconnected. These circuits may be intermittent or resistive when loaded, and if possible, should be
checked by monitoring for a voltage drop with the system operational (under load).
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Check for proper installation of aftermarket electronic equipment which may affect the integrity of other systems refer to Diagnostic Aids.
See: Diagrams/Diagnostic Aids
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Refer to System Diagnosis. See: System Diagnosis
