SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSBUICK2013REGAL TURBO PREMIUM, STANDARD TRANSREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 193 (HVAC SYSTEM - AUTOMATIC)DIAGNOSTIC INFORMATION AND PROCEDURESDTC B0193CIRCUIT/SYSTEM TESTING
2013 Buick Regal Turbo Premium, Standard Trans

Circuit/System Testing

2013 Buick Regal Turbo Premium, Standard TransSECTION Circuit/System Testing
WARNING: This page is about a different car, the 2012 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF and all vehicle systems off, disconnect the X1 harness connector at the K8 blower motor control module. It may take up to 2 minutes for all vehicle systems to power down.
  2. Test for less than 10 Ω between the ground circuit terminal 5 and ground.
    • If 10 Ω or greater 
    1. Ignition OFF.
    2. Test for less than 2 Ω in the ground circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, repair the open/high resistance in the ground connection.
    • If less than 10 Ω 
  3. Ignition ON.
  4. Verify a test lamp illuminates between the B+ circuit terminal 6 and ground.
    • If the test lamp does not illuminate and the circuit fuse is good 
    1. Ignition OFF.
    2. Test for less than 2 Ω in the B+ circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, verify the fuse is not open and there is voltage at the fuse.
    • If the test lamp does not illuminate and the circuit fuse is open 
    1. Ignition OFF.
    2. Test for infinite resistance between the B+ circuit terminal 6 and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the K8 blower motor control module.
    • If the test lamp illuminates 
  5. Connect a DMM between the control circuit terminal 3 and ground.
  6. Verify the resistance values listed below with the blower switch in the appropriate speed position:
    • OFF - 133-138k Ω
    • 1 - 88-92k Ω
    • 2 - 75-80k Ω
    • 3 - 63-67k Ω
    • 4 - 46-50k Ω
    • 5 - 11-15k Ω
    • 6 -.5-2k Ω
    • If not within the specified range 
    1. Ignition OFF, disconnect the harness connector at the K33 HVAC control module.
    2. Test for less than 1 V between the control circuit and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V
    3. Test for infinite resistance between the control circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance.
    4. Test for less than 2 Ω in the control circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω replace the K33 HVAC control module.
    • If within the specified range 
  7. Connect the X1 harness connector at the K8 blower motor control module. Disconnect the harness connector at the M8 blower motor, ignition ON.
  8. Verify a test lamp illuminates between the control circuit terminal B and ground with the blower ON.
    • If the test lamp does not illuminate 
    1. Ignition OFF, disconnect the X2 harness connector at the K8 blower motor control module.
    2. Test for infinite resistance between the control circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance.
    3. Test for less than 2 Ω in the control circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω replace the K8 blower motor control module.
    • If the test lamp illuminates 
  9. Connect a test lamp between the control circuit terminal A and the control circuit terminal B.
  10. Verify the test lamp becomes progressively brighter as the blower speed is increased and progressively dimmer as the blower speed is decreased.
    • If the test lamp does not illuminate 
    1. Ignition OFF, disconnect the X2 harness connector at the K8 blower motor control module.
    2. Test for less than 1 V between the control circuit terminal A and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V
    3. Test for less than 2 Ω in the control circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω replace the K8 blower motor control module.
    • If the test lamp illuminates, but does not change in brightness 
    1. Ignition OFF, disconnect the X2 harness connector at the K8 blower motor control module.
    2. Test for infinite resistance between the control circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the K8 blower motor control module.
    • If the test lamp changes in brightness as the blower speed is changed 
  11. Test or replace the M8 blower motor.
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.