Dodge B150 Headlight Switch Guide (1987-1994): Choosing a Reliable Replacement
Stop your flickering or dead headlights by understanding why the original switch fails and how to pick the best new part for your van.
- The original switch design is prone to failure because it handles the full headlight current without relays.
- Symptoms include headlights cutting out, flickering, or failing completely.
- Always inspect the wiring connector for melting and replace it if damaged to protect the new switch.
- Standard Motor Products (SMP) is a trusted aftermarket brand for this part; installing a headlight relay kit is the best long-term fix.
Is Your Dodge B150 Headlight Switch Failing?
If you own a 1987-1994 Dodge B150, you're likely familiar with its simple, rugged design. However, one common point of failure is the headlight switch. Because these vans route the full power of the headlights through the dashboard switch, it's under a lot of stress. Over time, the high electrical load generates heat, which can wear out the internal contacts, melt the plastic housing, and cause a range of lighting problems.
Common Symptoms of a Bad Headlight Switch
- Headlights Cut Out While Driving: Your headlights may suddenly turn off, then come back on after a few seconds or minutes. This is the internal circuit breaker overheating and resetting.
- Flickering Headlights: Worn internal contacts can cause an inconsistent connection, leading to flickering.
- No Headlights or Parking Lights: The switch may fail completely, leaving you with no lights at all. Often, you can still flash the high beams with the column lever because it uses a different circuit.
- Dash Lights Don't Work: The part of the switch that controls the instrument panel lights (a rheostat) can burn out. This often happens independently of the headlight function.
- Melted Connector or Burning Smell: A visual inspection of the switch's electrical plug may reveal melted plastic or discoloration, a clear sign of overheating.
Check the Connector First!
Before ordering a new switch, pull the old one and inspect the wiring harness connector. If it is melted, brittle, or burnt, you MUST replace it too. Plugging a new switch into a bad connector will cause the new part to fail quickly.
Choosing the Right Aftermarket Headlight Switch
Since new OEM Mopar parts for this van are generally unavailable, you will be choosing from aftermarket brands. Quality can vary, but for a critical part like this, it's best to avoid the cheapest options.
- Standard Ignition (Standard Motor Products/SMP): This is a highly reputable aftermarket manufacturer. Their parts are known for being reliable and are often considered a go-to for professional mechanics when an OEM part isn't an option. They are a safe bet for quality and fit.
- Rostra Powertrain: Rostra is another established aftermarket brand, but they are more known for other electronic components. While likely a functional replacement, there is less specific user feedback on their headlight switches compared to SMP.
Pro Tip: Make Your New Switch Last
The best way to prevent a new switch from burning out is to install a headlight relay harness. This inexpensive kit reroutes the high-power headlight circuit through relays, so the dashboard switch only has to carry a tiny amount of power to activate them. This is a popular and permanent fix for this common Dodge van issue.
Headlight Switch Replacement Cost
The cost to replace the headlight switch depends on whether you do it yourself or hire a shop.
| Part Type | Part Cost | Notes |
|---|---|---|
| New Aftermarket | $35 - $58 | This is the typical price range for a quality replacement from brands like Standard Ignition. |
| New OEM (NOS) | $75+ (if found) | New Old Stock parts are rare, discontinued, and not necessary for a quality repair. |
| Used OEM | $15 - $25 | Very cheap, but not recommended. A used switch is likely near the end of its life. |
| Shop Labor | $100 - $225 | Expect 1 to 1.5 hours of labor for a professional to replace the switch. |
Frequently Asked Questions (FAQ)
Is it hard to replace the headlight switch myself?
For a DIYer with basic tools, this is a manageable job. The main challenge is removing the dashboard bezel without breaking the old plastic clips. The switch itself is held by a few screws. The knob is released by pressing a small button on the switch body. Expect it to take about an hour.
Why do my dash lights flicker or not dim properly?
This is caused by the rheostat inside the switch wearing out. Interestingly, running the dash lights on their dimmest setting creates more heat and can cause the switch to fail faster. A new switch will solve this problem.
Are there any recalls on the 1987-1994 Dodge B150 headlight switch?
No, there are no active recalls or Technical Service Bulletins (TSBs) from the NHTSA for the headlight switch on this specific vehicle range. The failures are due to the original design and age, not a specific manufacturing defect.
Can I just repair my old switch?
While some people have had temporary success cleaning the internal contacts, it is not a reliable or long-term fix. Given the low cost of a new part and the safety risk of failing headlights, replacement is the only recommended solution.
Technical Specifications
Pull-type dash-mounted switch with integrated rheostat for instrument panel dimming. Controls headlights and parking lights. No external relay in the factory circuit.
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.
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