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Home >> Chevrolet >> 2015 >> Cruze LT, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 29 (HVAC System - Manual) >> Diagnostic Information and Procedures >> Blower Motor Malfunction (C41, C60) >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2015 Chevrolet Trax and 2015 Buick Encore. However, it is still accessible from the selected car via links, so may be relevant.

Relay Test

  1. Ignition OFF, disconnect the KR32E Blower Motor Relay.
  2. Test for 60-180 Ω between terminals 85 and 86.
    • If not between 60-180 Ω 

      Replace the KR32E Blower Motor Relay.

    • If between 60-180 Ω 
  3. Test for infinite resistance between the terminals listed below:
    • 30 and 86
    • 30 and 87
    • 30 and 85
    • 85 and 87
    • If less than infinite resistance 

      Replace the KR32E Blower Motor Relay.

    • If infinite resistance 
  4. Install a 3 A fused jumper wire between relay terminal 86 and 12 V. Install a jumper wire between relay terminal 85 and ground.
  5. Test for less than 2 Ω between terminals 30 and 87.
    • If 2 Ω or greater  

      Replace the KR32E Blower Motor Relay.

    • If less than 2 Ω 
  6. All OK

Blower Switch

  1. Ignition OFF, disconnect the X1 harness connector at the K33 HVAC Control Module.
  2. Test for infinite resistance between the ground terminal 1 and each control terminal with the blower switch in the OFF position.
    • If less than infinite resistance 

      Replace the K33 HVAC Control Module.

    • If infinite resistance 
  3. Test for less than 2 Ω between the ground terminal 1 and each control terminal with the switch in the appropriate position.
    • If 2 Ω or greater 

      Replace the K33 HVAC Control Module.

    • If less than 2 Ω 
  4. All OK.

Blower Motor Resistor

  1. Ignition OFF, disconnect the harness connector at the R3 Blower Motor Resistor.
  2. Test for 2.7-3.3 Ω between terminal C and terminal E.
    • If not between 2.7-3.3 Ω 

      Replace the R3 Blower Motor Resistor.

    • If between 2.7-3.3 Ω 
  3. Test for 1.62-1.98 Ω between terminal C and terminal A.
    • If not between 1.62-1.98 Ω 

      Replace the R3 Blower Motor Resistor.

    • If between 1.62-1.98 Ω 
  4. Test for 0.72-0.88 Ω between terminal C and terminal B.
    • If not between 0.72-0.88 Ω 

      Replace the R3 Blower Motor Resistor.

    • If between 0.72-0.88 Ω 
  5. Test for 0.36-0.44 Ω between terminal C and terminal D.
    • If not between 0.36-0.44 Ω 

      Replace the R3 Blower Motor Resistor.

    • If between 0.36-0.44 Ω 
  6. All OK.
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