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.
2000 Buick Century CustomFACTORY OEM SERVICE PROCEDURE
Electrical Component Locator: Connectors
CONNECTORS LOCATION
| Component | Location |
|---|---|
| C101 (Gray, 20 Pin) | Left side of engine compartment, on strut tower. |
| C105 (Gray, 4 Pin) | On radiator, near right cooling fans. |
| C111 (7 Pin) | Left side of engine compartment, top of transmission. |
| C113 (Gray, 20 Pin) | Left side of engine compartment, top of transaxle. |
| C141 (Black, 10 Pin) | Behind left headlamp. |
| C142 (Black, 10 Pin) | Behind right headlamp. |
| C200 (Black, 56 Pin) | Behind right side of dash. |
| C201 (Black, 48 Pin) | Behind dash, on right side of steering column. |
| C205 (Black, 4 Pin) | Behind dash, on right side of steering column. |
| C206 (Black, 3 Pin) | Behind right side of dash, near C200. |
| C240 (Natural, 10 Pin) | In console, behind console shift. |
| C242 (Black, 3 Pin) | Behind ashtray. |
| C250 (8 Pin) | Behind center of dash. |
| C252 (32 Pin) | Behind center of dash. |
| C301 (16 Pin) | On "A" pillar. |
| C302 (Black, 16 Pin) | On "A" pillar. |
| C311 (Black, 6 Pin) | Below driver seat. |
| C312 (Black, 6 Pin) | Below passenger seat. |
| C351 (Black, 10 Pin) | On "B" pillar. |
| C352 (Black, 10 Pin) | On "B" pillar. |
| C390 (Black, 8 Pin) | Right rear, on top of package shelf panel. |
| C395 (Black, 2 Pin) | Rear compartment, under right side of package shelf trim panel. |
| C398 (Black, 3 Pin) | Behind right "C" pillar trim panel. |
| C401 (Gray, 6 Pin) | In rear compartment, behind taillamp. |
| C402 (Gray, 6 Pin) | In rear compartment, behind taillamp. |
| C405 (Black, 8 Pin) | On rear compartment floor, forward of spare tirewell. |
| C410 (Black, 8 Pin) | Right side of rear compartment, above wheelwell. |
| C420 (Blue, 2 Pin) | In rear compartment, under center of rear window trim panel. |
| C915 (Black, 4 Pin) | In center of rear compartment lid applique. |
Factory Service Tools
Use the Manual With the Right Hardware
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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.