Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSBUICK2013REGAL TURBO PREMIUM, STANDARD TRANSREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 77 (SUNROOF SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESPOWER SUNROOF/SUNSHADE MALFUNCTIONCIRCUIT/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 2011 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Because of the accessibility of the switches, perform the switch component testing before beginning the circuit/system testing.
- Ignition OFF, disconnect the harness connector at the K61 sunroof control module.
- Test for less than 10 Ξ© between the ground circuit terminal 2 and ground.
- If greater than the specified value, test the ground circuit for an open/high resistance.
- Verify that a test lamp illuminates between the B+ circuit terminal 1 and ground.
- If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal and the B+ circuit fuse is open, determine if the K61 sunroof control module is causing the fuse to open. Replace the K61 sunroof control module.
- Ignition ON, verify that a test lamp does not illuminate between the circuit terminals listed below and ground:
- Terminal 3
- Terminal 5
- Terminal 6
- If the test lamp does illuminate, test the appropriate circuit for a short to voltage.
- Ignition OFF, verify that a test lamp does not illuminate between the circuit terminals listed below and B+:
- Terminal 3
- Terminal 5
- Terminal 6
- If the test lamp does illuminate, test the appropriate circuit for a short to ground.
- Disconnect the harness connector at the S72 sunroof switch and the S88 sunroof tilt switch.
- Test for less than 10 Ξ© between the circuit terminals listed below:
- S72 sunroof switch terminal 1 and K61 sunroof control module terminal 3
- S72 sunroof switch terminal 4 and K61 sunroof control module terminal 5
- S88 sunroof ventilation switch terminal 1 and K61 sunroof control module terminal 3
- S88 sunroof ventilation switch terminal 4 and K61 sunroof control module terminal 6
- If greater than the specified value, test the appropriate circuit for an open/high resistance.
- If all circuits test normal, test or replace the K61 sunroof control module.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.