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Home >> Chevrolet >> 2020 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different car >> Section 96 (Wiper System And Washer System) >> Diagnostic Information and Procedures >> Windshield Wiper System Malfunction >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2019 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.

Test 1

    NOTE:

    It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.

  1. Ignition/Vehicle & All vehicle systems - Off
  2. Disconnect the electrical connector:S82 Windshield Wiper/Washer Switch
  3. Test for less than 10 ohms between the test points:Low Reference circuit terminal 1 & Ground
    • If 10 ohms or greater 
    1. Disconnect the electrical connector:K9 Body Control Module
    2. Test for less than 2 ohms between the test points:Low Reference circuit terminal 1@Component harness & Terminal 10 X3@Control module harness
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component:K9 Body Control Module
    • Go to next step: If less than 10 ohms 
  4. Ignition - On / Vehicle - In Service Mode
  5. Verify the scan tool parameter:Windshield Wiper High Speed Switch = Inactive
    • If not the specified state 
    1. Ignition/Vehicle & All vehicle systems - Off
    2. Disconnect the electrical connector:K9 Body Control Module
    3. Test for infinite resistance between the test points:Signal circuit terminal 2@Component harness & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • If infinite resistance - Replace the component:K9 Body Control Module
    • Go to next step: If the specified state 
  6. Connect a 3 A fused jumper wire between the test points:Signal circuit terminal 2 & Low Reference circuit terminal 1
  7. Verify the scan tool parameter:Windshield Washer Switch = Active
    • If not the specified state 
    1. Ignition/Vehicle - Off & Remove - Jumper wire(s)
    2. Disconnect the electrical connector:K9 Body Control Module
    3. Ignition - On / Vehicle - In Service Mode
    4. Test for less than 1 V between the test points:Signal circuit terminal 2@Component harness & Ground
      • If 1 V or greater - Repair the short to voltage on the circuit.
      • Go to next step: If less than 1 V
    5. Test for less than 2 ohms between the test points:Signal circuit terminal 2@Component harness & Terminal 20 X3@Control module harness
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component:K9 Body Control Module
    • Go to next step: If the specified state 
  8. Test for greater than 8 V between the test points:Signal circuit terminal 3 & Ground
    • If less than 8 V 
    1. Ignition/Vehicle & All vehicle systems - Off
    2. Disconnect the electrical connector:K9 Body Control Module
    3. Test for infinite resistance between the test points:Signal circuit terminal 3@Component harness & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • If infinite resistance - Replace the component:K9 Body Control Module
    4. Test for less than 2 ohms between the test points:Signal circuit terminal 3@Component harness & Terminal 20 X3@Control module harness
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component:K9 Body Control Module
    • Go to next step: If 8 V or greater 
  9. Ignition/Vehicle & All vehicle systems - Off
  10. Disconnect the electrical connector:K9 Body Control Module
  11. Ignition - On / Vehicle - In Service Mode
  12. Test for less than 1 V between the test points:Signal circuit terminal 3@S82 Windshield Wiper/Washer Switch & Ground
    • If greater than 1 V 

      Repair the short to voltage on the circuit.

    • Go to next step: If less than 1 V 
  13. Test or replace the component:S82 Windshield Wiper/Washer Switch

Test 2

    NOTE:

    It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.

  1. Ignition/Vehicle & All vehicle systems - Off
  2. Disconnect the electrical connector:M75 Windshield Wiper Motor
  3. Test for less than 10 ohms between the test points:Ground circuit terminal 4 & Ground
    • If 10 ohms or greater 
    1. Test for less than 2 ohms between the test points:Ground circuit terminal 4 & Ground terminal G203
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Repair the open/high resistance in the ground connection.
    • Go to next step: If less than 10 ohms 
  4. Ignition - On / Vehicle - In Service Mode
  5. Verify the scan tool parameter:Windshield Wiper Park Signal = Inactive
    • If not the specified state 
    1. Ignition/Vehicle - Off
    2. Disconnect the electrical connector:K9 Body Control Module
    3. Test for infinite resistance between the test points:Signal circuit terminal 1@Component harness & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • Go to next step: If infinite resistance - Replace the component:K9 Body Control Module
      • Go to next step: If the specified state 
  6. Connect a 3 A fused jumper wire between the test points:Signal circuit terminal 1 & Ground circuit terminal 4
  7. Verify the scan tool parameter:Windshield Wiper Park Signal = Active
    • If not the specified state 
    1. Ignition/Vehicle - Off & Remove - Jumper wire(s)
    2. Disconnect the electrical connector:K9 Body Control Module
    3. Ignition - On / Vehicle - In Service Mode
    4. Test for less than 1 V between the test points:Signal circuit terminal 1@Component harness & Ground
      • If 1 V or greater - Repair the short to voltage on the circuit.
      • Go to next step: If less than 1 V
    5. Ignition/Vehicle - Off
    6. Test for less than 2 ohms between the test points:Signal circuit terminal 1@Component harness & Circuit terminal 17 X4@Control module harness
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component:K9 Body Control Module
    • Go to next step: If the specified state 
  8. Ignition/Vehicle & All vehicle systems - OffRemove the component:KR12B Windshield Wiper Relay
  9. Test for less than 10 ohms between the test points:
    • Ground circuit terminal 85@Component harness & Ground
    • Ground circuit terminal 87A@Component harness & Ground
    • If 10 ohms or greater 
    1. Test for less than 2 ohms between the test points:Ground circuit & The other end of the circuit@Ground terminal
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Repair the open/high resistance in the ground connection.
    • Go to next step: If less than 10 ohms 
  10. Verify a test lamp turns On between the test points:B+ circuit terminal 87 & Ground circuit terminal 87A
    • If the test lamp does not turn On and the circuit fuse is OK 
    1. Ignition/Vehicle - Off & Remove - Test lamp
    2. Remove the component:F16UA Fuse
    3. Test for less than 2 ohms between the test points:B+ circuit terminal 87@Relay Socket & Output terminal@Fuse
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Verify the fuse is OK and there is voltage at the fuse.
    • If the test lamp does not turn On and the circuit fuse is open 
    1. Ignition/Vehicle - Off & Remove - Test lamp
    2. Remove the component:F16UA Fuse
    3. Test for infinite resistance between the test points:B+ circuit terminal 87 & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • Go to next step: If infinite resistanceReplace the component:X50A Fuse Block - Underhood &
    • Go to next step: If the test lamp turns On 
  11. Connect a test lamp between the test points:Control circuit terminal 86 & Ground circuit terminal 85
  12. Ignition - On / Vehicle - In Service Mode
  13. Perform the scan tool control function:Windshield Wiper Motor Relay - Low SpeedActive & Off

    Verify the test lamp turns On and Off.

    • If the test lamp is always Off 
    1. Ignition/Vehicle - Off & Remove - Test lamp
    2. Disconnect the electrical connector:K9 Body Control Module
    3. Test for infinite resistance between the test points:Control Circuit@Relay Socket & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • Go to next step: If infinite resistance
    4. Test for less than 2 ohms between the test points:Control Circuit@Relay Socket & The other end of the circuit@Control module harnessTerminal
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component:K9 Body Control Module
    • If the test lamp is always On 
    1. Ignition/Vehicle - Off & Remove - Test lamp
    2. Disconnect the electrical connector:K9 Body Control Module
    3. Ignition - On / Vehicle - In Service Mode
    4. Test for less than 1 V between the test points:Control Circuit & Ground
  14. Ignition/Vehicle - Off
  15. Install the component:KR12B Windshield Wiper Relay
  16. Remove the component:KR12C Windshield Wiper Speed Control Relay
  17. Test for less than 10 ohms between the test points:Control circuit terminal 30 & Ground
    • If 10 ohms or greater 

      Test or replace the component:KR12B Windshield Wiper Relay

    • Go to next step: If less than 10 ohms 
  18. Connect a test lamp between the test points:Control circuit terminal 30 & Ground
  19. Perform the scan tool control function:Windshield Wiper Motor Relay Command - Low SpeedActive & Off
  20. Verify the test lamp turns On and Off.
    • If the test lamp does not turn On and Off 

      Test or replace the component:KR12B Windshield Wiper Relay

    • Go to next step: If the test lamp turns On and Off 
  21. Verify a test lamp turns On between the test points:B+ circuit terminal 85 & Ground
    • If the test lamp does not turn On 

      Replace the component:X50A Fuse Block - Underhood

    • Go to next step: If the test lamp turns On 
  22. Connect a test lamp between the test points:B+ circuit terminal 85 & Control circuit terminal 86
  23. Perform the scan tool control function:Windshield Wiper Motor Relay Command - High SpeedActive = Off
  24. Verify the test lamp turns On and Off.
    • If the test lamp is always Off 
    1. Ignition/Vehicle - Off & Remove - Test lamp
    2. Disconnect the electrical connector:K9 Body Control Module
    3. Ignition - On / Vehicle - In Service Mode
    4. Test for less than 1 V between the test points:Control Circuit@Relay Socket & Ground
      • If 1 V or greater - Repair the short to voltage on the circuit.
      • Go to next step: If less than 1 V
    5. Test for less than 2 ohms between the test points:Control Circuit@Relay Socket & The other end of the circuit
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Test or replace the component:K9 Body Control Module
    • If the test lamp is always On 
    1. Ignition/Vehicle - Off & Remove - Test lamp
    2. Disconnect the electrical connector:K9 Body Control Module
    3. Test for infinite resistance between the test points:Control Circuit & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • If infinite resistance - Replace the component:K9 Body Control Module
    • Go to next step: If the test lamp turns On and Off 
  25. Ignition/Vehicle - Off & Remove - Test lamp
  26. Install the component:KR12C Windshield Wiper Speed Control Relay
  27. Connect a test lamp between the test points:M75 Windshield Wiper MotorControl circuit terminal 5 & Ground circuit terminal 4
  28. Ignition - On / Vehicle - In Service Mode
  29. Perform the scan tool control function:Windshield Wiper Motor Relay - Low Speed & Off

    Verify the test lamp turns On and Off.

    • If the test lamp is always Off 
    1. Ignition/Vehicle - Off & Remove - Test lamp
    2. Remove the component:KR12C Windshield Wiper Speed Control Relay
    3. Test for infinite resistance between the test points:Control Circuit & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • If infinite resistance
    4. Test for less than 2 ohms between the test points:Control Circuit@Relay Socket & The other end of the circuit
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Test or replace the component:KR12C Windshield Wiper Speed Control Relay
    • If the test lamp is always On 
    1. Ignition/Vehicle - Off & Remove - Test lamp
    2. Remove the component:KR12C Windshield Wiper Speed Control Relay
    3. Test for less than 1 V between the test points:Control Circuit@Relay Socket & Ground
      • If 1 V or greater - Repair the short to voltage on the circuit.
      • If less than 1 VTest or replace the component:KR12C Windshield Wiper Speed Control Relay
    • Go to next step: If the test lamp turns On and Off 
  30. Test or replace the component:M75 Windshield Wiper Motor
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