1983-1992 Isuzu Impulse Brake Light Switch: A Complete Guide
If your brake lights or cruise control are acting up, this small switch is a likely, and easy, fix.
- A faulty brake light switch is a common cause for both brake light failure and cruise control problems on the Impulse.
- Always check the bulbs and fuses first to rule out simpler issues before replacing the switch.
- This is a very easy and inexpensive part to replace yourself, with the only challenge being the tight workspace under the dash.
- New OEM parts are likely unavailable; quality aftermarket brands like Standard Ignition and Dorman are the recommended choice.
Is Your Impulse's Brake Light Switch Failing?
A brake light switch is a wear-and-tear item. After decades of use, it's common for it to fail. Before you assume the switch is bad, always check your brake light bulbs and the related fuse first. If those are fine, here are the common symptoms of a failing brake light switch:
- Brake Lights Don't Work: The most serious symptom is when your brake lights do not light up at all when you press the pedal. This is a major safety hazard.
- Brake Lights Stay On: The switch can fail in the 'on' position, leaving your brake lights illuminated even when your foot is off the pedal. This can drain your battery and confuse other drivers.
- Cruise Control Malfunctions: If you can't set your cruise control, or it turns off unexpectedly, it could be because the switch is sending a false signal that the brakes are being applied.
Choosing the Right Aftermarket Switch
For a vehicle like the 1983-1992 Isuzu Impulse, finding a new original equipment (OEM) brake light switch from Isuzu is highly unlikely. The aftermarket is your go-to source, offering several reliable options that meet or exceed original specifications.
Here’s a breakdown of the available brands:
- Standard Ignition (SMP): Often considered a top-tier aftermarket brand, Standard Motor Products manufactures parts that are well-regarded for their quality and durability, often designed to be as good as or better than the original. They are a solid choice for reliability.
- Dorman: Dorman is a well-known brand that specializes in creating direct replacements for OEM parts. While some of their more complex components can have mixed reviews, their switches and sensors are generally considered a reliable and cost-effective solution.
- Facet: An established European brand, Facet produces parts that are built to OE specifications. They are a reputable option and reviews for their switches are generally positive.
- Replacement / Rostra Powertrain: These are often more budget-friendly or generic brands. While they can be a good value, they may not have the same long-term track record for durability as brands like Standard or Dorman.
Pro Tip
Given the low cost of even the premium aftermarket brands for this part, spending a few extra dollars for a switch from a brand with a strong reputation like Standard Ignition or Dorman can provide extra peace of mind.
Cost of Replacing Your Brake Light Switch
| Part Type | Price Range |
|---|---|
| New Aftermarket | $14.84 - $29.38 |
| Shop Labor | $50 - $100 |
| New OEM | Likely Discontinued |
Known Issues & Recalls
While Isuzu has issued recalls for brake light switches on much newer vehicles, extensive searches of the NHTSA database show no specific recalls or Technical Service Bulletins (TSBs) for the brake light switch on the 1983-1992 Isuzu Impulse. Any failure is typically due to the age and normal wear of the part.
Frequently Asked Questions (FAQ)
Can I replace the brake light switch myself?
Yes, this is a great DIY job for beginners. The switch is located on the brake pedal bracket under the dashboard. It usually requires you to unplug the electrical connector and then unclip or unscrew the switch. The main challenge is the tight space.
How do I know if it's the switch or just a burnt-out bulb?
If only one brake light is out, it's almost certainly a bulb. If all brake lights are out, the first things to check are the fuse and the switch. Since bulbs and fuses are cheap and easy to inspect, check them before buying a new switch.
Can a bad brake light switch really stop my cruise control from working?
Absolutely. The brake light switch is the primary way your car cancels cruise control. If the switch is faulty and incorrectly tells the car's computer that the brakes are being pressed, the cruise control will not engage.
Do I need to adjust the new switch?
Most aftermarket switches are designed to be direct replacements. When installing, make sure the plunger on the switch is properly depressed when the brake pedal is at rest and released as soon as you begin to press the pedal. Some switches can be threaded for fine-tuning this adjustment.
Technical Specifications
OEM Part Numbers: 19021018 2532001B00 2532075A00 2532075A0E 83311AA010 83311AA011 88924663 8941187540 8941187541 8943629300 94118754 94362930
Located on the brake pedal assembly. Typically a 2-terminal or 4-terminal push-type switch.
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.
- Isuzu Impulse: