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 MANUALSBUICK2006TERRAZA CXL, 3.5 L, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 173 (LIGHTING SYSTEMS)DIAGNOSTIC INFORMATION AND PROCEDURESCOURTESY LAMPS MALFUNCTIONCIRCUIT/SYSTEM TESTINGDOOR OPEN SWITCH CIRCUIT TEST -- DRIVER
2006 Buick Terraza CXL, 3.5 L, AWD
Door Open Switch Circuit Test -- Driver
2006 Buick Terraza CXL, 3.5 L, AWDSECTION Door Open Switch Circuit Test -- Driver
WARNING: This page is about a different car, the 2006 Chevrolet Monte Carlo and 2006 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the (C1 for Coupe) harness connector at the driver door lock.
- Test for less than 10 ohms of resistance between the appropriate ground circuit terminal listed below and ground.
- Base Level Sedan terminal 6
- Uplevel Sedan terminal 8
- Coupe terminal D C1
- If greater than the specified range, test the ground circuit for an open/high resistance.
- Ignition ON, verify the scan tool Driver Door Open Sw. parameter is Closed.
- If not the specified value, test the appropriate signal circuit terminal listed below for a short to ground. If the circuit tests normal, replace the BCM.
- Base Level Sedan terminal 5
- Uplevel Sedan terminal 7
- Coupe terminal C C1
- Install a 3A fused jumper wire between the appropriate signal circuit terminal listed and ground. Verify the scan tool Driver Door Open Sw. parameter is Open.
- Base Level Sedan terminal 5
- Uplevel Sedan terminal 7
- Coupe terminal C C1
- If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM.
- If all circuits test normal, test or replace the door lock.
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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.