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 47 (WIPER SYSTEM AND WASHER SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC B3873COMPONENT TESTINGOUTPUT CONTROL TESTS
2013 Buick Regal Turbo Premium, Standard Trans
Output Control Tests
2013 Buick Regal Turbo Premium, Standard TransSECTION Output Control Tests
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.
Ignition ON, command the Windshield Washer Relay Command ON and OFF with a scan tool. Observe that the KR11 windshield washer pump relay clicks and the G24 windshield washer pump runs.
- If the KR11 windshield washer pump relay does not work, replace the X50A underhood fuse block.
- If the KR11 windshield washer pump relay works, but the G24 windshield washer pump does not run, test the washer fluid pump control circuit and the washer fluid pump ground circuit.
- If all circuits test normal, replace the G24 windshield washer pump.
RENDER: 1.0x
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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.