Chevrolet Caprice Headlight Switch Guide for 1966-1974 Models
Having trouble with your 1966-1974 Caprice's lights? It might be your headlight switch.
- Flickering lights are a classic sign of an internal circuit breaker failing in the switch.
- This is a common DIY repair; the main challenge is reaching the switch under the dash.
- For long-term reliability, choose a premium aftermarket brand like ACDelco or Standard Ignition.
- Always inspect the wiring connector for heat damage when replacing the switch.
Signs of a Failing Headlight Switch
When a headlight switch starts to fail on a classic car like the 1966-1974 Caprice, the signs can be intermittent at first. You might have to wiggle the knob to get the headlights to turn on, or they might flicker while you're driving. These are classic symptoms of worn internal contacts or a faulty circuit breaker inside the switch.
Common Failure Symptoms:
- Headlights, taillights, or dashboard lights not working at all.
- Lights flickering or turning off when you hit a bump.
- Having to jiggle the switch to make the lights work.
- Dashboard lights cannot be dimmed.
- A burning smell or smoke from the dashboard area.
Choosing the Right Aftermarket Headlight Switch
For a vehicle from this era, finding a "New Old Stock" (NOS) GM part can be difficult and expensive. Aftermarket parts are the most common and practical solution. The key is to choose a reputable brand to ensure reliability.
Brand Tiers for Your Caprice
1. Premium Aftermarket (ACDelco, Standard Motor Products):
- ACDelco: Often considered the original equipment (OE) supplier for GM, ACDelco parts are a top choice for a factory-like fit and function. While some production is now overseas, they are generally held to a high-quality standard. An ACDelco switch is a solid investment for reliability.
- Standard Ignition (Standard Motor Products): A well-respected aftermarket brand with a long history. They produce quality electrical components that are often on par with OE parts and are a trusted choice among mechanics.
2. Economy/Standard Aftermarket (Replacement):
- Replacement: This category covers various budget-friendly brands. While they offer significant cost savings, the quality can be inconsistent. They are a viable option for a car that is not driven daily, but for a primary vehicle or a show car, investing in a premium brand is recommended for long-term peace of mind.
Pro Tip: When replacing the switch, inspect the wiring connector. If it looks melted, brittle, or corroded, it should be replaced as well. A bad connector can damage a new switch.
Estimated Costs
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket (Premium) | $45 - $80 |
| New Aftermarket (Economy) | $25 - $45 |
| Shop Labor | $100 - $200 |
Frequently Asked Questions
Can I replace the headlight switch myself?
Yes, this is a DIY-friendly job for someone with basic tools. The process involves disconnecting the battery, removing the knob and retaining nut, and accessing the switch from under the dashboard to unplug the connector. It can be awkward to reach, but it does not typically require special tools.
Do I need to replace the dimmer switch too?
Not necessarily. The main headlight switch and the floor-mounted dimmer switch are separate components on these vehicles. If your high and low beams aren't switching correctly, but the headlights turn on, the dimmer switch is the likely culprit, not the main headlight switch.
Why do my dashboard lights not work after replacing the switch?
First, make sure the new switch's dimmer function is working by rotating the knob. If they still don't work, check the fuse and the bulbs themselves. It's also possible the printed circuit board on the back of your instrument cluster has failed, which is a separate issue.
Are there any recalls for the headlight switch on my Caprice?
No official recalls were found on the NHTSA database for the headlight switch on the 1966-1974 Chevrolet Caprice. Recalls for vehicles of this age are rare unless a manufacturer extends a specific campaign.
Technical Specifications
OEM Part Numbers: 1995122 1995123 1995142 1995147 1995149 1995150 1995151 1995163 1995164 1995165 1995173 1995175 1995179 1995184 1995186 1995194
Typically features an 8-prong male blade-type terminal. The switch is operated by a pull knob and includes a rotating rheostat for dimming dashboard lights.
We Have This Part in Stock
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.