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 MANUALSBUICK1990SKYLARK BASE, 4D SEDAN, 125C/MD9REPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - BASIC TESTINGBASIC IGNITION SYSTEM CHECKSDISIGNITION COIL POWER SOURCE
1990 Buick Skylark Base, 4D Sedan, 125C/MD9
Ignition Coil Power Source
1990 Buick Skylark Base, 4D Sedan, 125C/MD9SECTION Ignition Coil Power Source
Turn ignition on and check Pink or Pink/Black wire of ignition module for battery voltage. If battery voltage is not present, check ignition/ECM fuse. If fuse is not blown, check for open between fuse and ignition module.
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.