A Guide to the Headlight Switch for the 1963-1965 GMC PB1500 Series
Don't get left in the dark; learn the symptoms of a failing headlight switch and how to choose the right replacement for your classic GMC van.
- Symptoms of a bad switch include flickering lights, no headlights, or no dash lights.
- Replacement is a simple DIY job for most owners, typically taking less than an hour.
- Standard Ignition is a reputable aftermarket brand, while 'Replacement' offers a budget-friendly option.
- If a new switch fails, check for underlying issues like a bad ground or a short in the wiring.
Is Your Headlight Switch Failing?
A bad headlight switch on a classic truck like the PB1500 Series can create confusing and dangerous problems. Since the switch controls several lighting circuits, one internal issue can affect your lights in different ways. Often, the first sign of trouble is flickering headlights or dash lights that only work when you jiggle the switch knob. Over time, the internal contacts and the built-in circuit breaker can get corroded or worn out, leading to a poor connection.
Common Failure Symptoms
- Intermittent Lights: Headlights, tail lights, or dash lights flicker or cut out randomly while driving. This can be caused by a worn internal circuit breaker or dirty contacts.
- No Headlights: You might have parking lights when you pull the switch to the first position, but the headlights don't turn on when you pull it all the way out.
- No Dash Lights: The instrument panel lights don't work, or the dimmer function is scratchy and unreliable. Sometimes, this is the first part of the switch to fail.
- Burning Smell: A hot plastic or electrical smell from the dashboard area can point to the switch overheating. This is a serious sign that the switch is failing and could be a fire hazard.
Choosing the Right Aftermarket Headlight Switch
For a vintage vehicle like the 1963-1965 PB1500 Series, finding a new Original Equipment Manufacturer (OEM) switch from GM is highly unlikely. The market primarily consists of aftermarket replacements. These parts are designed to fit and function just like the original.
Brand Tiers: What to Expect
- Standard Ignition: Often considered a higher-quality aftermarket brand, Standard Motor Products (SMP) has a long history of making reliable electronic components. Forum users and mechanics often trust this brand for a good fit and long-term durability, sometimes viewing their parts as equal to or better than original parts. These parts are engineered with quality materials like copper alloy conductors to ensure good electrical performance.
- Replacement: This brand tier offers a cost-effective solution to get your lights working again. These switches are designed to meet original specifications and provide a functional, direct-fit part at a budget-friendly price. While they may not have the same long-standing reputation as premium brands, they are a popular choice for many repairs.
Pro Tip: If you replace a headlight switch and the new one fails quickly, it often indicates a deeper electrical problem in the truck. A short circuit or a bad ground in the lighting system can overload the switch, causing it to burn out. Before installing another new switch, inspect the wiring harness for damage.
Headlight Switch Replacement Cost
The cost for a new aftermarket headlight switch for your 1963-1965 GMC PB1500 Series is affordable. The parts themselves are not expensive, and if you have a professional do the work, the labor time is minimal.
| Part Type | Price Range |
|---|---|
| New Aftermarket Headlight Switch | $27.74 - $89.08 |
| Shop Labor | $90 - $150 |
Frequently Asked Questions (FAQ)
How do I know for sure my headlight switch is bad?
The most common signs are flickering lights, headlights not turning on at all (while other lights work), or dash lights that are out. Sometimes you might smell burning plastic near the switch. If wiggling the knob makes the lights work intermittently, the switch is almost certainly the problem.
Is replacing the headlight switch a DIY job?
Yes, for most people with basic tools, this is a very feasible DIY repair. 🎬 See how to replace an old GM headlight switch yourself. The switch is located on the dashboard. The process involves reaching under the dash to press a small spring-loaded button on the switch body, which releases the knob and shaft. 🎬 Learn the trick to removing a GM headlight switch knob. After that, you unscrew a retaining nut on the dash, unplug the wiring connector, and install the new switch.
What's the difference between the 'Replacement' and 'Standard Ignition' brands?
Standard Ignition is a well-known aftermarket brand with a reputation for quality and durability, often preferred by professional mechanics. 'Replacement' is a value-oriented brand that provides a functional part that meets OEM specifications at a lower price point.
My headlights still don't work after replacing the switch. What now?
If a new switch doesn't solve the problem, check other parts of the lighting circuit. The floor-mounted high/low beam dimmer switch is a common failure point, as it can get corroded. Also, check for bad grounds, which are a frequent issue on older trucks. Finally, inspect the wiring and the headlight connectors themselves for corrosion or damage.
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Technical Specifications
OEM Part Numbers: 1995122 1995123 1995142 1995147 1995149 1995150 1995151 1995163 1995164 1995165 1995173
Dash-mounted pull-knob switch with integrated rheostat for instrument dimming. Features an 8-blade male terminal connector. Controls headlights, parking lights, and instrument panel illumination.
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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.