1973-1983 Buick Century Ignition Switch: A Comprehensive Guide
Struggling to start your classic Century? Your ignition switch could be the problem; here's what you need to know.
- A failing ignition switch can cause a no-start condition or dangerous stalling while driving.
- The switch is a mechanical part located on the steering column, separate from the key cylinder.
- For this vehicle, Standard Ignition is a top-tier aftermarket brand, while 'Replacement' is a budget option.
- Before replacing the switch, try starting the car in Neutral to rule out a bad neutral safety switch.
Is Your Ignition Switch Failing?
For a car from the 1973-1983 era, the ignition switch is a mechanical part with electrical contacts that wears out over time. After decades of use, the internal contacts can get worn or corroded, leading to a poor connection. If you're experiencing any of these issues, your ignition switch is a likely suspect.
Key Symptoms of a Bad Ignition Switch:
- Car Won't Crank or Start: You turn the key and nothing happens, or it only works after jiggling the key. This can happen when the contacts inside the switch are too worn to send power to the starter.
- Stalling While Driving: The engine might suddenly shut off, especially when going over bumps. This is a serious safety issue, as you also lose power steering. It happens when vibrations cause the worn switch to momentarily lose electrical contact.
- Accessories Don't Work: Your radio, wipers, or dashboard lights might not turn on, or they may flicker. The switch has different positions for these accessories, and if those contacts are bad, they won't get power.
- Key Feels Loose or Hard to Turn: While this can also be the lock cylinder, a problem in the switch can cause binding or a lack of resistance when turning the key.
Safety Notice: Recalls
While the major GM ignition switch recalls from the 2010s involved much newer vehicles (2003 and newer), it's important to understand the risks of a faulty switch. A switch that fails while driving can cause a loss of engine power and power steering, increasing the risk of an accident. No specific recalls for the 1973-1983 Buick Century ignition switch were found through the NHTSA database.
Choosing the Right Aftermarket Ignition Switch
For a vehicle of this age, new Original Equipment Manufacturer (OEM) parts are generally not available. The good news is that the aftermarket provides several solid options. The ignition switch for these cars is a relatively simple, non-electronic part, making quality aftermarket replacements a reliable choice.
| Brand Tier | Brand(s) | Quality & Cost Assessment |
|---|---|---|
| Premium Aftermarket | Standard Ignition (SMP) | Standard is a highly respected brand known for producing parts that meet or exceed original specifications. They are a top choice for mechanics and enthusiasts who want reliability and longevity. Expect to pay a bit more, but the quality justifies the cost. |
| Standard Aftermarket | Rostra Powertrain | Rostra is known for a wide range of automotive components. While their primary focus is often on powertrain and transmission parts, their electrical components are generally considered a solid, mid-tier option. This is a good balance between cost and quality. |
| Economy | Replacement | "Replacement" is a generic brand that offers parts at a very low price point. These parts will get the job done and are a good option for a budget-conscious repair. However, the focus is on affordability, so they may not have the same lifespan as premium brands. |
Frequently Asked Questions (FAQ)
Can I replace the ignition switch myself?
Yes, this is a DIY-feasible job for someone with basic mechanical skills. The switch is located on the top of the steering column, under the dashboard. The main steps involve removing the lower dash panels, lowering the steering column for access, disconnecting the electrical plugs, and unbolting the old switch. You must disconnect the battery before starting.
What's the difference between the ignition switch and the lock cylinder?
The ignition lock cylinder is the part you put your key into. The ignition switch is a separate electrical component that the lock cylinder activates via a connecting rod. If your key is physically stuck or won't turn, the problem is likely the lock cylinder. If the key turns but you have electrical problems, the ignition switch is the more likely culprit.
Do I need any special tools?
For replacing just the ignition switch, you'll typically only need basic hand tools like a socket set and screwdrivers. If you also need to replace the lock cylinder, you will need a steering wheel puller and a lock plate compressor tool.
Could a bad neutral safety switch cause similar problems?
Yes. A faulty or misaligned neutral safety switch can prevent the car from cranking, making it seem like an ignition switch problem. Before replacing the ignition switch, try starting the car in Neutral instead of Park. If it starts in Neutral, your neutral safety switch is the likely issue.
Technical Specifications
OEM Part Numbers: 1990110 1990087
Column-mounted electrical switch activated by a mechanical rod from the ignition lock cylinder.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.